# Open Source

Build stellar documentation with Astro

Starlight is an open-source Astro-based documentation theme from the Astro team that produces fast, accessible, SEO-friendly docs sites with minimal config. Ships dark mode, full-text search via Pagefind, versioned navigation, i18n, auto-generated sidebars, and beautiful defaults out of the box. Ideal for open-source projects, product docs, and technical handbooks that want first-class performance.

State-machine guardrails for controlling which tools AI coding agents can use at each phase.

Statewright is a guardrail layer for AI coding agents that uses explicit state machines to control what an agent can do at each stage of a workflow. Instead of relying only on prompt instructions, teams can model phases such as plan, implement, test, and review, then constrain tool access for clients like Claude Code, Codex, Cursor, opencode, and related MCP workflows.

Open-source browser infrastructure for AI agents at scale

Steel is an open-source browser API purpose-built for AI agents, providing managed headless browser sessions with anti-bot bypass, proxy rotation, CAPTCHA solving, and session persistence. It handles the infrastructure layer that browser automation agents like Browser Use and Stagehand run on top of. Self-hostable or available as a cloud service. Over 6,000 GitHub stars.

UI component workshop

Storybook is an open-source workshop for building, documenting, and testing UI components in isolation. Render every visual state of React, Vue, Angular, Svelte, or Web Components, write interaction tests, visual regression tests, and accessibility checks, and publish a living design reference. Trusted by thousands of teams including GitHub, Airbnb, Shopify, and Microsoft as their single source of UI truth.

AWS open-source SDK for building model-driven AI agents

Strands Agents is an open-source SDK from AWS that takes a model-driven approach to building AI agents. Developers define a prompt, model, and tools, and the LLM handles planning and orchestration autonomously. Supports Amazon Bedrock, Anthropic, OpenAI, Gemini, Ollama, and more. Powers Amazon Q Developer and AWS Glue in production. Available in Python and TypeScript with native MCP support.

Open-source headless CMS for developers

Strapi is the leading open-source headless CMS with 65K+ GitHub stars providing a customizable API-first content management system. Auto-generates REST and GraphQL APIs from content types defined through a visual builder. Features role-based access control, media library, internationalization, draft/publish workflow, and a plugin marketplace. Built with Node.js and supports PostgreSQL, MySQL, SQLite, and MariaDB. Self-hostable with Strapi Cloud also available.

AI schema generator from natural language

Structa is an AI tool that turns natural language descriptions into production-ready database schemas and SQL in under 45 seconds, focused on PostgreSQL and Supabase. Recognized as an editor's choice for AI schema generation, it is the fastest idea-to-schema tool available, generating optimized table structures, relationships, indexes, and constraints from plain English project requirements.

Mutation testing framework to validate test quality

Stryker Mutator is an open-source mutation testing framework for JavaScript, TypeScript, C#, and Scala that measures the real effectiveness of your test suite. It introduces small code mutations and checks whether tests catch them, revealing gaps that line coverage metrics miss. Supports incremental mode for CI/CD integration.

Open-source generalist AI agent for browser and code tasks

Suna is an open-source generalist AI agent that can autonomously browse the web, write and execute code, manage files, and interact with external services. It features a real-time browser automation engine, an isolated code execution sandbox, and integrations with popular APIs. Designed as an open-source alternative to commercial AI agent platforms. Over 9,000 GitHub stars with rapid community growth.

AI agent safety SDK with guard, redact, and scan modules

Superagent is an open-source AI agent safety SDK that provides runtime protection through four modules: Guard for detecting prompt injections and unsafe tool calls, Redact for removing PII and secrets, Scan for analyzing repos against AI-targeted attacks, and Test for red-team evaluations. It works with any LLM provider and includes open-weight guard models from 0.6B to 4B parameters with 50-100ms latency for real-time protection.

Enterprise internal app platform with AI generation

Superblocks is an enterprise internal application platform that uses AI to automate backend integrations and UI generation for high-performance internal tools. It targets pro-developer teams who need more control than typical low-code platforms provide, offering code-level customization alongside visual building with enterprise features like SSO, audit logs, and fine-grained permissions.

Open-source Firecracker sandboxes for long-running AI agents

Superserve is an open-source sandbox infrastructure layer for AI agents that need durable computers instead of short-lived shells. It runs isolated Firecracker microVMs, supports pause, resume, snapshot, fork, preview URLs, MCP connectivity, SDK/API control, Docker workloads, and self-hosting, while the hosted service adds pay-as-you-go agent sandboxes for teams.

IDE for the AI Agents Era — run an army of coding agents in parallel

Open-source meta-IDE that orchestrates 10+ AI coding agents (Claude Code, Codex, OpenCode) in parallel. Uses git worktree isolation to prevent conflicts, with a unified monitoring dashboard and batch diff review. With 7.9k+ GitHub stars, it's the go-to tool for teams that want to scale AI-assisted development across multiple concurrent tasks.

Reusable computer vision tools for developers

Supervision is an open-source Python toolkit by Roboflow providing reusable CV utilities for detection, tracking, annotation, and dataset management. It works with any model including YOLO and Hugging Face via a standardized Detections class. Features include 20+ annotators, ByteTrack object tracking, zone counting, speed estimation, and dataset conversion between COCO, YOLO, and Pascal VOC formats.

Production-ready React Suspense and error handling

TypeScript library extending React Suspense API with declarative components and hooks for production applications. Provides ErrorBoundary with selective error catching via shouldCatch, SSR-safe Suspense with clientOnly prop, Delay component preventing loading flashes, ErrorBoundaryGroup for coordinated resets, and data fetching components including SuspenseQuery and SuspenseInfiniteQuery. MIT licensed by Toss with three years of active development.

API design and documentation standard

Industry-standard specification for defining RESTful APIs with a comprehensive ecosystem of tools. OpenAPI Specification (formerly Swagger) describes endpoints, parameters, responses, and authentication in YAML/JSON format. Swagger UI generates interactive API documentation, Swagger Editor provides a visual spec editor, and Swagger Codegen generates server stubs and client SDKs in 40+ languages. The foundation of API-first development workflows used by millions of developers worldwide.

Multi-agent orchestration with 10+ swarm patterns

Swarms is an enterprise-grade multi-agent orchestration framework with 6,100+ GitHub stars that provides 10+ swarm patterns including sequential, concurrent, hierarchical, mixture-of-agents, and graph-based workflows. The SwarmRouter lets teams switch between orchestration strategies by changing a single parameter. It supports MCP for tool integration, multi-model providers via Anthropic, OpenAI, and local models, and includes an AutoSwarmBuilder that generates agents from task descriptions.

Open-source library for generating synthetic tabular data

Synthetic Data Vault (SDV) is an MIT-backed open-source Python library for generating synthetic tabular, relational, and time-series data. It learns statistical patterns from real datasets and produces synthetic versions that preserve distributions, correlations, and referential integrity. Supports single-table, multi-table, and sequential data with built-in privacy and quality metrics.

Open-source GUI for managing AI coding agents with your own API keys

Unified desktop interface for Codex and Claude Code with a model selector dropdown. Features a git-integrated sidebar, parallel task and thread management, chat and plan modes, and customizable agent access levels. Run via desktop app or npx for instant access. Brings visual project management to terminal-based AI coding agents without sacrificing their command-line power.

Markdown WYSIWYG editor with live preview

TOAST UI Editor is a full-featured Markdown and WYSIWYG editor by NHN that supports GFM standard syntax with extensible chart and UML rendering. It offers dual editing modes with seamless switching, live preview with scroll sync, syntax highlighting, and a plugin architecture for adding color pickers, table merging, code highlighting, and diagram support. The editor ships with React, Vue, and vanilla JavaScript wrappers and supports 20+ languages.

Utility-first CSS framework for rapid UI development

Tailwind CSS is a utility-first CSS framework with 87K+ GitHub stars for building custom designs by composing single-purpose utility classes directly in HTML. Instead of writing custom CSS, use classes like flex, pt-4, text-center to style elements. Features a JIT compiler for instant builds, responsive design utilities, dark mode support, and extensive customization. Powers the design systems behind shadcn/ui, Headless UI, and thousands of production sites.

Code-first agent framework for data analytics tasks

TaskWeaver is Microsoft's open-source code-first agent framework that converts natural language requests into executable Python code for data analytics and workflow automation. Unlike text-based agent frameworks, it preserves rich in-memory data structures like DataFrames across conversation turns, supports custom algorithm plugins as callable functions, and verifies generated code before execution. It includes a Planner for task decomposition and a Code Interpreter for generation and execution.

AI framework for distributed vulnerability research

Taskflow Agent is an open-source MIT-licensed AI framework by GitHub Security Lab that automates vulnerability discovery through a three-stage pipeline: threat modeling, issue suggestion, and audit validation. It has discovered 91 confirmed vulnerabilities in major open-source projects including Outline and WooCommerce, using distributed community-powered security research coordinated by AI agents.

Build smaller, faster desktop apps with Rust and web tech

Tauri is a Rust-based framework for building desktop applications using web technologies like HTML, CSS, and JavaScript—without bundling Chromium. By leveraging the system's native WebView, Tauri apps ship as tiny installers under 10MB and use 30-50MB RAM at idle, a fraction of Electron's footprint. It supports Windows, macOS, and Linux with any frontend framework (React, Vue, Svelte, etc.) and provides a secure Rust backend for system-level operations with fine-grained permission controls.

Self-hosted AI accounting for freelancers and small teams

TaxHacker is an open-source, self-hosted AI accounting app that automatically extracts financial data from receipts, invoices, and bank statements using LLMs. It supports 170+ currencies and 14 cryptocurrencies with historical exchange rate conversion, multi-project accounting, and custom AI extraction fields. Works with OpenAI, Gemini, Mistral, or local models via Ollama—deploy with Docker and keep all financial data under your control.

Cloud-native CI/CD framework for Kubernetes-native pipelines.

Tekton is a cloud-native CI/CD framework that provides Kubernetes-native pipeline resources. A Linux Foundation / CD Foundation project, it offers reusable, composable building blocks for creating CI/CD systems. Used by Google Cloud Build, Red Hat OpenShift Pipelines, and other platforms as their underlying pipeline engine.

Managed Postgres platform with 200+ extensions as pre-built stacks

Tembo is a managed PostgreSQL platform that packages 200+ Postgres extensions into purpose-built stacks for specific workloads. Stacks include OLAP analytics, vector search, message queues, geospatial, and machine learning, turning PostgreSQL into a specialized database for each use case. Eliminates the need for separate Redis, Elasticsearch, or Kafka instances alongside Postgres.

AI design tool that edits React in your codebase

Tempo Labs is a YC-backed AI design and prototyping tool that generates and edits React code directly within a developer's existing codebase, maintaining project styles and conventions. Unlike tools that produce standalone code, Tempo supports both greenfield and brownfield projects, understanding existing component libraries, theme systems, and coding patterns to generate code that fits naturally.

Durable execution for fault-tolerant workflows

Temporal is an open-source durable execution platform that ensures application code runs to completion regardless of failures or outages. It captures workflow state at every step, enabling seamless recovery without custom retry logic. With SDKs for Go, Java, Python, TypeScript, and .NET, Temporal powers mission-critical orchestration at Netflix, Nvidia, and other enterprises. Valued at $5B, it replaces fragile cron jobs, state machines, and saga patterns with resilient workflow-as-code.

Google's lightweight ML framework for mobile and embedded

TensorFlow Lite is Google's lightweight ML framework for deploying models on mobile and embedded devices. It supports quantization, GPU/NPU delegation, and runs on Android, iOS, Linux, and microcontrollers. Provides pre-trained models, model conversion tools from TensorFlow and JAX, and hardware acceleration via GPU, Hexagon DSP, and CoreML delegates. Powers on-device ML in billions of Google app installations.

NVIDIA's LLM inference optimization and acceleration library

TensorRT-LLM is NVIDIA's open-source library for optimizing LLM inference on NVIDIA GPUs. It provides kernel fusion, quantization (FP8, INT4, INT8), KV cache optimization, and in-flight batching to maximize throughput. Supports multi-GPU and multi-node setups with tensor and pipeline parallelism, and integrates with Triton Inference Server for production deployment of models like LLaMA, GPT, Mistral, and Qwen.

Open-source LLM gateway with built-in optimization and A/B testing

TensorZero is an open-source LLMOps platform in Rust that unifies an LLM gateway, observability, prompt optimization, and A/B experimentation in a single binary. It routes requests across providers with sub-millisecond P99 latency at 10K+ QPS while capturing structured data for continuous improvement. Supports dynamic in-context learning, fine-tuning workflows, and production feedback loops. Backed by $7.3M seed funding, 11K+ GitHub stars.

Self-hosted SSH and server management platform

Termix is a self-hosted SSH and server management platform that provides a modern web-based terminal, connection management, SFTP file transfer, and multi-device sync without subscription fees. It serves as an open-source alternative to Termius, offering team collaboration features, connection sharing, and a clean interface for managing SSH connections across servers, all deployable via Docker.

IaC orchestration layer for scaling Terraform and OpenTofu

Terragrunt is an infrastructure-as-code orchestration tool that wraps Terraform and OpenTofu to keep configurations DRY, manage remote state, and coordinate multi-module deployments. The 1.0 release introduced stacks, filters, run reports, and backward compatibility guarantees after 900+ releases and tens of millions of infrastructure deployments. It provides a thin orchestration layer that eliminates duplication across environments without replacing the underlying IaC tools.

Open-source GitOps automation for Terraform and OpenTofu pull requests

Terrateam is open-source GitOps infrastructure orchestration for Terraform and OpenTofu pull requests. It automates plans and applies in GitHub workflows, supports monorepos and many workspaces, and adds apply-only locks, OPA/Rego policy checks, cost and drift signals, and approval controls without forcing teams into a separate IaC platform.

Hugging Face's open-source inference server for embeddings, rerankers, and classifiers

Text Embeddings Inference is Hugging Face's Apache-2.0 server for high-throughput embedding, reranking, and sequence-classification models. TEI packages token-based dynamic batching, optimized Transformers kernels, Safetensors loading, OpenAI-compatible embedding endpoints, Prometheus metrics, and configurable OpenTelemetry tracing in deployable CPU and GPU images.

Hugging Face's production LLM serving framework

Text Generation Inference (TGI) is Hugging Face's production-ready serving framework for large language models. It features flash attention, continuous batching, tensor parallelism, quantization via GPTQ/AWQ/EETQ, and Safetensors support. Powers Hugging Face's Inference API and Inference Endpoints, with an OpenAI-compatible API and Docker deployment. Supports LLaMA, Mistral, Falcon, and other popular model architectures.

Google's pretrained foundation model for zero-shot time-series forecasting

TimesFM is a pretrained time-series foundation model from Google Research that performs zero-shot forecasting on diverse datasets without task-specific training. It handles univariate and multivariate time series across domains including finance, logistics, energy, and infrastructure monitoring with accuracy competitive against traditional statistical methods like ARIMA and Prophet.

Headless rich text editor framework with real-time collaboration

Tiptap is a headless rich text editor toolkit for building Notion-like collaborative content experiences in web applications. Built on ProseMirror, it provides a modular extension system for formatting, mentions, tables, drag-and-drop blocks, slash commands, and custom node types. The open-source core is framework-agnostic with official bindings for React, Vue, and vanilla JavaScript. Cloud extensions add real-time collaboration, AI content generation, and document management.

CLI token usage tracker for AI coding agents

Tokscale is a CLI tool that tracks token usage and costs across AI coding agents including Claude Code, Codex, OpenCode, Gemini CLI, Cursor, and more. Built with a native Rust core for high-performance processing, it provides detailed breakdowns of input, output, cache, and reasoning tokens with real-time pricing calculations via LiteLLM data. Features include interactive 2D/3D contribution graphs, web visualization dashboards, global leaderboards, and JSON export for cost analysis.

Open-source i18n and translation platform

Tolgee is an open-source internationalization platform that enables in-context translation directly within applications. Translators hold ALT and click any element to edit strings inline without touching code files. It integrates machine translation from DeepL, Google, and AWS, with SDKs for React, Angular, Next.js, Vue, and Svelte. Self-hostable for data sovereignty with granular team permissions.

Run and govern MCP servers across desktop, CLI and Kubernetes

Open-source MCP runtime and governance platform that runs servers in isolated containers, curates registries, enforces access policies, and operates gateways across desktop, CLI, and Kubernetes.

Open-source low-code platform — build and deploy internal tools with minimal code.

ToolJet is an open-source low-code framework for building and deploying internal tools. Visual app builder with 50+ UI components, connects to databases, APIs, SaaS tools, and cloud storage. Supports JavaScript and Python. 30K+ GitHub stars. Self-hostable alternative to Retool.

Open-source observability and self-healing layer for AI agents

TraceRoot is a YC S25-backed open-source observability platform purpose-built for AI agents and LLM apps. It combines OpenTelemetry-compatible tracing with an agentic debugging runtime that reads your source code, correlates failures with recent commits, and proposes fix PRs automatically. BYOK support spans seven LLM providers; the entire stack runs self-hosted via Docker Compose, with TraceRoot Cloud available for managed deployments.

Open-source SOAR platform with AI-powered playbooks

Tracecat is a YC S24-backed open-source SOAR (Security Orchestration, Automation and Response) platform that lets security teams build AI-powered playbooks for automated incident response. It provides visual workflow builders for creating response procedures, integrates with common security tools, and handles alert triage, enrichment, and remediation — positioned as an open-source alternative to Tines and Splunk SOAR.

NVIDIA's optimized AI model serving platform

Triton Inference Server is NVIDIA's open-source inference serving platform that deploys AI models from TensorRT, PyTorch, ONNX, TensorFlow, OpenVINO, Python, and more across cloud, data center, and edge environments. It supports dynamic batching, model ensembles, concurrent model execution on GPUs and CPUs, and real-time, streaming, and batch inference patterns. Includes Model Analyzer for profiling and Model Navigator for automated optimization.

Comprehensive open-source vulnerability scanner

Trivy is an open-source vulnerability scanner with 24K+ GitHub stars by Aqua Security that scans container images, file systems, Git repositories, Kubernetes clusters, and IaC configurations for security issues. Detects OS package and language-specific vulnerabilities, misconfigurations, secrets, and license violations in a single tool. Runs as a simple CLI with zero configuration needed. Supports SBOM generation, VEX for vulnerability filtering, and CI/CD integration.

High-performance build system for JavaScript and TypeScript

High-performance build system from Vercel for JavaScript and TypeScript monorepos. Turborepo intelligently caches task outputs based on content hashing, parallelizes builds across CPU cores, and shares cached results between team members via remote caching. A single turbo.json orchestrates tasks across packages with topological ordering, pruning, and composable configuration for reusable task snippets.