Tools

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.

A prompt theme engine for any shell

A cross-platform prompt theme engine that works with any shell including PowerShell, Bash, Zsh, and Fish. Customize your terminal prompt with rich themes, dynamic segments, and real-time information from Git repos, Kubernetes clusters, cloud providers, battery status, and execution time. The most versatile prompt customization tool available, with hundreds of community themes and a visual config editor.

Enhanced capabilities for Claude Code sessions

A community plugin collection for Windsurf IDE that extends its AI coding capabilities with specialized tools for testing, documentation, deployment, and code analysis. Each plugin adds targeted functionality that complements Windsurf's built-in features, letting developers customize their AI-assisted workflow for specific languages, frameworks, and development patterns.

Spec-driven development for AI coding assistants

An open-source tool for generating detailed API specifications from natural language descriptions and existing codebases. Produces OpenAPI-compatible specs automatically, streamlines API documentation workflows, and helps teams maintain consistent, up-to-date API contracts across services. Reduces the manual effort of writing and maintaining API specs by inferring endpoints, schemas, and parameters from your actual code.

TypeScript ORM that feels like SQL

Lightweight, serverless-ready TypeScript ORM with zero dependencies bringing SQL-like syntax into TypeScript for maximum type-safety. Maps queries closely to raw SQL with full auto-completion and type inference. Features Drizzle Kit for migrations, Drizzle Studio for visual browsing, supports PostgreSQL, MySQL, SQLite, and Turso. Runs on Node.js, Bun, Deno, Cloudflare Workers, and Vercel Edge. 26K+ GitHub stars, growing fast as a Prisma alternative.

Self-hosted Heroku/Vercel alternative

Open-source, self-hostable PaaS alternative to Heroku, Vercel, and Netlify with 44K+ GitHub stars. Deploy static sites, APIs, full-stack apps, databases, and 280+ one-click services on your own VPS or bare metal via SSH. Features auto Let's Encrypt SSL, Git integration (GitHub/GitLab/Bitbucket/Gitea), S3 backups, Docker Swarm support, and a REST API for CI/CD automation. Self-hosted version is free forever with no features behind paywalls.

Minimal terminal coding harness

Prompt engineering and LLM management platform for teams building AI applications. Version control your prompts, run A/B tests across models, and track performance metrics. Provides a collaborative workspace where developers and product managers can iterate on prompts together, reducing the feedback loop between prompt changes and production quality metrics.

Glamorous agentic coding for the terminal by Charm

LSP-enhanced terminal coding agent from Charmbracelet with the broadest cross-platform support including Android. Features mid-session model switching and MCP extensibility for custom tool integration. Combines the elegance of Charmbracelet's TUI toolkit with practical coding assistance, offering a polished terminal experience for developers on any platform.

Open-source AI coding agent for the terminal

AI coding agent from Sourcegraph with full codebase awareness through Sourcegraph's code intelligence platform. Handles complex multi-file tasks by understanding code relationships, dependencies, and architectural patterns across entire repositories. Particularly strong for large enterprise codebases where understanding cross-repository context is critical for accurate code generation.

Beautifully designed components

Copy-paste component library for React that puts you in full control — not a dependency, you own the code. Built on Radix UI primitives and Tailwind CSS for accessibility and styling. The most popular React component system in the ecosystem, setting the standard for how modern component libraries should be distributed and customized by developers.

Kubernetes-native distributed LLM inference stack

llm-d is an open-source Kubernetes-native stack for distributed LLM inference with cache-aware routing and disaggregated serving. It separates prefill and decode stages across different GPU pools for optimal resource utilization, routes requests to nodes with warm KV caches, and integrates with vLLM as the serving engine. Apache-2.0 licensed with 2,900+ GitHub stars.

BEAM/Elixir-native framework for durable multi-agent systems

Jido is an Elixir-native AI agent framework that leverages the BEAM virtual machine's concurrency and fault-tolerance for building durable, distributed multi-agent systems. It provides primitives for agent lifecycle management, skill composition, and message-based coordination. Designed for teams running Elixir in production who need agent capabilities. Apache-2.0 with 1,600+ GitHub stars.

Open-source AI coworker with persistent memory and tool use

Rowboat is an open-source AI coworker platform that provides persistent memory, tool use, and multi-agent orchestration in a chat-based interface. It enables teams to build AI assistants that remember context across sessions, access internal tools and databases, and coordinate specialized sub-agents for complex workflows. Over 9,300 GitHub stars.

Go implementation of the Model Context Protocol SDK

mcp-go is a Go implementation of the Model Context Protocol, providing both server and client SDKs for building MCP integrations in Go. It supports stdio and SSE transports, resource management, tool registration, and prompt templates. Designed for Go developers building MCP servers for DevOps tools, CLI applications, and backend services. Over 8,000 GitHub stars.

Local microVM sandboxes for AI agent code execution

Microsandbox provides hardware-level isolated sandboxes for AI agents to execute code safely on local machines. Using microVMs with sub-200ms boot times, it offers stronger isolation than Docker containers while remaining lightweight enough for development workstations. OCI-compatible with support for Python and Node.js runtimes. Apache-2.0 licensed with 5,000+ GitHub stars.

Desktop orchestrator for parallel AI coding agents

1Code is an open-source desktop application for running multiple AI coding agents in parallel with isolated git worktrees and browser previews. It orchestrates agents like Claude Code and Codex in separate sandboxed environments, preventing conflicts while enabling concurrent development on different features. Built by the 21st.dev team with 5,300+ GitHub stars.

Open-source LLM red-teaming framework with 40+ attack types

DeepTeam is an open-source red-teaming framework for systematically testing LLM applications against 40+ adversarial attack types. It covers OWASP Top 10 for LLMs including jailbreaks, prompt injection, PII leakage, and hallucination attacks. Built as the sister project of DeepEval for security testing alongside evaluation. Apache-2.0 licensed.

Open-source LLMOps platform for prompt management and evaluation

Agenta is an open-source LLMOps platform that combines prompt engineering playgrounds, prompt version management, LLM evaluation, and observability in a unified interface. It supports 50+ LLM models with side-by-side prompt comparison, A/B testing, human evaluation workflows, and OpenTelemetry-native tracing. Self-hostable with 4,000+ GitHub stars.

Security scanner for MCP servers against tool poisoning attacks

MCP-Scan is a security tool that scans MCP servers for vulnerabilities including tool poisoning, prompt injection, cross-origin escalation, and rug pull attacks. Acquired by Snyk in 2026, it is the first dedicated security scanner for the MCP ecosystem. It analyzes tool descriptions, permissions, and behavior patterns to detect malicious or compromised MCP servers before they can exploit AI agents.

Fullstack MCP framework connecting any LLM to MCP servers

mcp-use is an open-source framework that enables any LLM to interact with MCP servers through a unified client interface. It bridges the gap between models that lack native MCP support and the growing ecosystem of MCP tools by providing automatic tool discovery, execution management, and multi-server orchestration. Supports both direct LLM connections and agent-based workflows. Over 9,000 GitHub stars.

High-performance open-source web crawler optimized for AI pipelines

Crawl4AI is an open-source Python web crawler built specifically for AI and data pipeline use cases. It features parallel crawling, heuristic-based content extraction, cosine similarity chunking for LLM context optimization, and multiple output formats including LLM-ready markdown. Frequently reaches GitHub trending and is adopted by teams building large-scale RAG datasets and training corpora.

Local-first AI notepad for meetings and voice notes

Hyprnote is a local-first AI notepad designed for capturing and processing meeting notes and voice recordings. It runs entirely on-device for privacy, transcribes audio using local models, and generates structured summaries, action items, and follow-ups. Built with Rust and Tauri for native desktop performance. Over 8,000 GitHub stars with strong privacy-focused community adoption.

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.