The best open source we build on.
A hand-picked shortlist of the repos behind modern AI work: agents, frameworks, local inference and automation. Hand-vetted, not star-counted.
Claude Code
Anthropic's agentic coding CLI; the one you're reading this in.
AutoGPT
The project that kicked off the autonomous-agent wave.
CrewAI
Role-playing multi-agent orchestration for autonomous crews.
OpenHands
Open autonomous software engineer (formerly OpenDevin).
Aider
AI pair programming in your terminal, wired to git.
Cline
Autonomous coding agent for VS Code with plan/act modes and MCP.
Roo Code
Cline fork adding multi-mode Code/Architect/Debug agent workflows.
Continue
Open-source VS Code/JetBrains assistant with chat and autocomplete.
opencode
Provider-agnostic terminal coding agent with 75+ models and a TUI.
Goose
Block's extensible on-machine AI agent built around MCP extensions.
OpenAI Codex CLI
OpenAI's open-source terminal coding agent with a cloud service.
Gemini CLI
Google's open terminal agent bringing Gemini to the command line.
gpt-engineer
Specify what to build in natural language and let the AI write it.
Superpowers
Agentic skills framework and methodology with a plugin marketplace.
LangChain
The de-facto toolkit for composing LLM apps, chains and agents.
LlamaIndex
Data framework for RAG; ingest, index and query your own corpus.
Haystack
deepset's modular pipeline framework for production search and QA.
LiteLLM
Unified OpenAI-format SDK and proxy that routes to 100+ providers.
Scrapling
Adaptive Python scraper with self-healing selectors and a built-in MCP.
Camoufox
Stealthy Firefox build that rotates fingerprints and hides automation.
Crawlee
Production crawling library with queues, proxy rotation and sessions.
ScrapeGraphAI
LLM-powered scraper that builds graph pipelines from a plain prompt.
browser-use
Makes websites accessible to AI agents so an LLM can drive a browser.
Stagehand
Browserbase's SDK mixing natural-language acts with Playwright code.
Firecrawl
Turn any website into clean LLM-ready markdown or structured data.
Crawl4AI
Open-source LLM-friendly web crawler and scraper, built for agents.
Playwright
Cross-browser automation with auto-wait and an official MCP server.
Puppeteer
Google's Chrome DevTools-Protocol automation library for Node.
undetected-chromedriver
Patched Selenium ChromeDriver that passes common bot mitigations.
AnythingLLM
All-in-one app to chat over your docs with any LLM, RAG and MCP.
Chroma
Python-first embedded vector store; pip install and prototype RAG.
Qdrant
Rust-built vector search engine with low-latency filtered search.
Weaviate
Vector DB with auto-embed modules and one-call hybrid search.
Milvus
Cloud-native vector database built for billion-scale similarity search.
LanceDB
Serverless embedded vector DB for multimodal AI with hybrid search.
pgvector
Postgres extension adding vector columns and ANN indexes.
txtai
All-in-one embeddings database for semantic search and LLM workflows.
mem0
Memory layer for agents; auto-extracts facts into vector and graph.
Letta
Stateful agent runtime that manages its own OS-style tiered memory.
Graphiti
Builds a temporally-aware knowledge graph for agent memory.
RAGFlow
RAG engine built on deep document understanding with grounded cites.
R2R
Agentic RAG with a REST API: multimodal ingestion and GraphRAG.
Cognee
Builds a knowledge graph plus vector store for hybrid GraphRAG.
Ollama
Run Llama, Mistral and friends locally with one command.
llama.cpp
Plain C/C++ LLM inference with quantization; runs almost anywhere.
LocalAI
Drop-in OpenAI-compatible API that runs models on your own hardware.
exo
Connect everyday devices into a p2p cluster to run frontier models.
Open WebUI
Self-hosted, feature-rich web UI for Ollama and OpenAI-style APIs.
vLLM
High-throughput LLM serving engine built around PagedAttention.
SGLang
Fast serving framework for LLMs and vision-language models.
Text Generation Inference
Hugging Face's production toolkit for serving and deploying LLMs.
n8n
Fair-code workflow automation with first-class AI and MCP nodes.
Dify
Visual LLM-app builder; workflows, agents and RAG in one console.
Langflow
Drag-and-drop builder where flows compile down to LangChain code.
Flowise
Lightweight drag-and-drop builder for chatbots and RAG flows.
Activepieces
AI-first no-code automation with 280+ pieces and native MCP support.
Windmill
Turn Python/TS/Go/SQL scripts into UIs, APIs, cron jobs and flows.
Trigger.dev
TypeScript-first durable workflows with retries, schedules and observability.
Strapi
The most popular self-hosted headless CMS with a native MCP server.
Payload
TypeScript-first headless CMS and fullstack Next.js framework.
Directus
Database-first CMS that wraps any SQL schema with an instant API.
Sanity Studio
Structured-content platform with config-as-code Studio and GROQ.
Ghost
Open-source publishing platform for newsletters, blogs and memberships.
Outline
Fast, collaborative knowledge base and wiki for growing teams.
Medusa
The most flexible open-source Node.js commerce platform.
Saleor
GraphQL-first commerce platform with multi-channel and an apps ecosystem.
Vendure
TypeScript-native commerce framework with end-to-end type safety.
Bagisto
Full Laravel e-commerce platform with multi-store and multi-currency.
Sylius
Headless commerce framework on Symfony built for deep customization.
Twenty
Modern open-source Salesforce alternative, designed AI-first.
EspoCRM
No-code-customizable CRM with deep admin, workflows and reports.
IDURAR
Node and React ERP/CRM covering invoicing, accounting and quotes.
Odoo
The most established modular open-source ERP and CRM suite.
Chatwoot
Open-source omni-channel support desk and live chat for teams.
Plane
Open-source Jira/Linear alternative for tasks, sprints and cycles.
Cal.com
Open-source Calendly alternative and scheduling infrastructure.
shadcn/ui
The dominant copy-own component model: Radix primitives + Tailwind.
react-bits
Animated, interactive, fully customizable React components.
Magic UI
50+ animated components and effects for design engineers.
Tremor
Accessible React components purpose-built for dashboards and charts.
cuicui
Copy-paste components that minimize JS and maximize CSS you own.
Supabase
The open-source Firebase alternative: Postgres, auth, storage and more.
Appwrite
Open-source backend platform: auth, databases, functions and storage.
PocketBase
Open-source backend in a single file: SQLite, auth, files and admin UI.
Hasura
Instant realtime GraphQL APIs on top of your Postgres database.
PostgREST
Serve a full REST API straight out of any Postgres database.
Whisper
OpenAI's robust speech-to-text model for transcription and translation.
WhisperX
Whisper with word-level timestamps, alignment and diarization.
faster-whisper
CTranslate2 reimplementation of Whisper at ~4x speed, lower memory.
whisper.cpp
Dependency-free C/C++ port of Whisper for CPU and Apple Silicon.
LiveKit
End-to-end realtime WebRTC stack for connecting humans and AI.
Pipecat
Python framework for realtime voice and multimodal conversational AI.
Coqui TTS
Deep-learning toolkit for text-to-speech with 1100+ languages.
Piper
Fast, local neural text-to-speech that runs well on a Raspberry Pi.
Chatterbox
Production-grade open TTS with zero-shot cloning across 23 languages.
Kokoro TTS
Tiny 82M-param open TTS with strong quality and fast offline inference.
Remotion
Make videos programmatically with React; render data-driven clips.
PostHog
Open-source product analytics, session replay, flags and experiments.
Plausible
Lightweight, privacy-friendly Google Analytics alternative.
Umami
Simple, fast, privacy-focused alternative to Google Analytics.
OpenPanel
Open-source web and product analytics; a Mixpanel alternative.
AppFlowy
Open-source AI collaborative workspace; the leading Notion alternative.
AFFiNE
Local-first Notion+Miro alternative: docs, whiteboards and databases.
Trilium Notes
Hierarchical note-taking app for building personal knowledge bases.
create-t3-app
The canonical typesafe Next.js scaffolder: tRPC, Drizzle, Auth.js, Tailwind.
Open SaaS
The leading 100% free open-source SaaS boilerplate, built on Wasp.
Wasp
Full-stack React/Node/Prisma framework described in one config file.
Next.js SaaS Starter
The Next.js team's minimal SaaS starter with Stripe and RBAC.
SaaS Boilerplate
MIT full-stack SaaS starter: Clerk auth, multi-tenancy, roles and i18n.
Taxonomy
shadcn's reference Next.js app: auth, Stripe, dashboard and MDX docs.
Refine
Headless React meta-framework for internal tools and CRUD dashboards.
Next.js Commerce
Vercel's high-performance headless commerce starter on App Router.
AutoGen
Microsoft's framework for building multi-agent conversations that solve tasks together.
MetaGPT
Assign one line of requirements and a virtual software company writes the whole project.
Agno
A lightweight, high-performance library for building agents with memory, knowledge, and tools.
OpenAI Agents SDK
OpenAI's lightweight, production-ready framework for building agentic apps.
Pydantic AI
A type-safe agent framework from the team behind Pydantic.
smolagents
Hugging Face's minimal library where agents write their actions as Python code.
BabyAGI
The minimal task-driven autonomous agent that helped define the genre.
AgentGPT
Configure and deploy autonomous AI agents straight from the browser.
Langfuse
Open-source LLM engineering platform for tracing, evals, and prompt management.
Arize Phoenix
Open-source AI observability and evaluation for LLM apps and agents.
OpenLLMetry
OpenTelemetry-based observability for LLMs, vector DBs, and agent frameworks.
Ragas
Evaluation toolkit for RAG pipelines and LLM applications.
DeepEval
The open-source LLM evaluation framework, like Pytest for LLMs.
Promptfoo
Test, evaluate, and red-team LLM apps from the command line or CI.
Evidently
Open-source evaluation and monitoring for ML and LLM systems.
OpenReplay
Open-source session replay and product analytics you can self-host.
Huginn
Self-hosted agents that watch the web and act on your behalf.
Node-RED
Flow-based programming for wiring together hardware, APIs and services.
Automatisch
Open-source Zapier alternative you can self-host for data privacy.
Kestra
Declarative, event-driven orchestration for data and workflows at scale.
Temporal
Durable execution engine that makes long-running workflows reliable.
Prefect
Pythonic workflow orchestration for modern data and ML pipelines.
Apache Airflow
The industry-standard platform for authoring and scheduling DAG workflows.
Budibase
Low-code platform for internal tools, apps and automations on your data.
Vercel AI Chatbot
Vercel's official, full-featured Next.js AI chatbot template.
Next.js Boilerplate
Production-ready Next.js starter with Tailwind, TypeScript, and a full test setup.
Full Stack FastAPI Template
The official FastAPI full-stack template: FastAPI, React, and Postgres.
create-t3-turbo
The T3 stack as a Turborepo monorepo with shared web and Expo apps.
Next.js SaaS Starter (Supabase)
Supabase's official Next.js subscription payments starter with Stripe.
Epic Stack
Kent C. Dodds' opinionated Remix starter for shipping fast without decision fatigue.
ShipFast
An open-source NextJS boilerplate to ship a startup in days, not weeks.
NestJS Boilerplate
A batteries-included NestJS starter with auth, i18n, and Postgres or MongoDB.
Keystone
Programmable, code-first headless CMS and GraphQL API for Node.js.
Wagtail
The leading Django-based open-source content management system.
TinaCMS
Git-backed headless CMS with live visual editing for Markdown and MDX.
Decap CMS
Git-based content management for static site generators.
Builder.io
Visual headless CMS and drag-and-drop page builder with an API.
Plone
Battle-tested, security-focused enterprise CMS built on Python.
Kirby
File-based, flexible CMS that adapts to any project structure.
Statamic
Laravel-powered, flat-file-first CMS with a modern control panel.
WooCommerce
The open-source commerce plugin that turns any WordPress site into a full store.
Spree Commerce
Modular open-source Rails commerce platform for B2C and B2B storefronts.
Reaction Commerce
Real-time, GraphQL-native headless commerce engine for JavaScript stacks.
BTCPay Server
Self-hosted, open-source Bitcoin and crypto payment processor with no fees.
Kill Bill
Open-source subscription billing and payments platform built for scale.
Hyperswitch
Open-source payments switch that routes transactions across many processors.
Lago
Open-source metering and usage-based billing engine for modern SaaS.
Shopware
API-first, Symfony-based commerce platform popular across European retail.
Mautic
The leading open-source marketing automation and campaign platform.
listmonk
Self-hosted, high-performance newsletter and mailing-list manager.
ERPNext
Full open-source ERP with a first-class CRM, selling and support suite.
Krayin CRM
Laravel-based open-source CRM for lead, pipeline and quote management.
Documenso
Open-source DocuSign alternative for e-signatures and contract flows.
Papercups
Open-source live chat and shared inbox alternative to Intercom.
FreeScout
Self-hosted help desk and shared mailbox alternative to Help Scout.
Zammad
Web-based help desk and ticketing across email, chat and social.
Prisma
Type-safe next-generation ORM for Node.js and TypeScript.
Drizzle ORM
Lightweight, SQL-first TypeScript ORM with zero runtime overhead.
SurrealDB
Multi-model database combining documents, graphs, and relations in one engine.
ClickHouse
Blazing-fast open-source column-oriented database for real-time analytics.
DuckDB
In-process analytical SQL database; the SQLite of OLAP.
TypeORM
Mature ORM for TypeScript and JavaScript with Active Record and Data Mapper.
SQLAlchemy
The Python SQL toolkit and Object Relational Mapper.
NocoDB
Open-source Airtable alternative that turns any database into a smart spreadsheet.
LangGraph
Build stateful, multi-actor agent applications as controllable graphs.
DSPy
Program language models instead of prompting them, then auto-optimize.
Semantic Kernel
Microsoft's enterprise SDK to wire LLMs into C#, Python, and Java apps.
Mastra
A TypeScript framework for building agents, workflows, and RAG.
Vercel AI SDK
The TypeScript toolkit for building streaming AI apps and agents.
Griptape
A modular Python framework for agents, pipelines, and workflows.
TensorRT-LLM
NVIDIA's library for optimizing and serving LLMs on its GPUs.
Triton Inference Server
NVIDIA's production server for any framework, any model, any hardware.
Ray Serve / Ray
Distributed framework for scaling model serving and AI workloads.
LMDeploy
Toolkit for compressing and serving LLMs with the TurboMind engine.
OpenLLM
Run any open LLM as an OpenAI-compatible API endpoint, anywhere.
KTransformers
Run huge MoE models locally by offloading experts to CPU and GPU.
MLC LLM
Universal LLM deployment engine that compiles models to any device.
Aphrodite Engine
High-throughput LLM inference engine powering large-scale serving.
Logseq
Privacy-first, local-first outliner for networked notes and knowledge graphs.
Joplin
Open-source, end-to-end-encrypted note-taking and to-do app with sync.
BookStack
Simple, self-hosted wiki platform organized into books, chapters and pages.
Wiki.js
Powerful, modern, open-source wiki running on Node.js.
Meilisearch
Lightning-fast, typo-tolerant search engine with a developer-friendly API.
Typesense
Open-source, typo-tolerant search engine optimized for instant results.
Docusaurus
Meta's React-powered static site generator for docs and content.
SiYuan
Privacy-first, local-first personal knowledge base with block-level editing.
Jan
An open-source, offline ChatGPT alternative that runs entirely on your machine.
GPT4All
Run private, local LLMs on everyday desktops and laptops, no GPU required.
Text Generation WebUI
The "Gradio" Swiss-army UI for running and tinkering with local text models.
KoboldCpp
A single-file, llama.cpp-based runner with a built-in UI and image generation.
llamafile
Ship an entire LLM as one cross-platform executable file.
Lobe Chat
A modern, self-hostable chat UI for local and cloud models with plugins and vision.
GPT4Free
A unified client that reverse-engineers many model providers behind one local API.
FAISS
Meta's battle-tested library for billion-scale similarity search.
Marqo
End-to-end vector search engine with built-in embedding generation.
Vespa
Big-data serving engine fusing vector, text, and structured search.
Sentence Transformers
The standard toolkit for text and image embeddings and rerankers.
rerankers
One tiny Python API for every reranking model and method.
Verba
Weaviate's open-source Golden RAGtriever app, ready out of the box.
SWIRL AI Search
Federated RAG search across all your apps with no data movement.
Scrapy
The battle-tested Python framework for large-scale web crawling.
Colly
A fast, idiomatic scraping framework for Go.
Playwright for Python
Cross-browser automation and scraping with the Python Playwright bindings.
Selenium
The original cross-browser automation suite via WebDriver.
Maxun
No-code platform that turns websites into APIs and spreadsheets.
Katana
A fast crawler built for security recon and URL discovery.
GPT Crawler
Crawl a site and produce a knowledge file for a custom GPT.
MarkItDown
Convert documents and web content into clean LLM-ready Markdown.
MUI (Material UI)
Comprehensive React component library implementing Google's Material Design.
Chakra UI
Accessible, composable React component library with first-class theming.
Ant Design
Enterprise-grade React UI design language and component library.
Radix Primitives
Unstyled, accessible React primitives for building your own design system.
Headless UI
Completely unstyled, accessible UI components for React and Vue.
Mantine
Full-featured React component and hooks library with 100+ components.
daisyUI
The most popular component library for Tailwind CSS, framework-agnostic.
Shoelace (Web Awesome)
A forward-thinking library of framework-agnostic web components.
Coqui STT
Deep-learning speech-to-text engine that runs offline on a wide range of devices.
Vosk
Lightweight offline speech recognition toolkit for 20+ languages and embedded devices.
F5-TTS
Flow-matching zero-shot voice cloning TTS that fakes fluent speech from a short reference clip.
OpenVoice
Instant voice cloning with granular control over tone, emotion, accent, and rhythm.
Bark
Transformer text-to-audio model that speaks, sings, laughs, and makes sound effects.
Real-Time Voice Cloning
Clone a voice from five seconds of audio and synthesize arbitrary speech in real time.
AudioCraft
Meta's library for high-quality music and sound generation with MusicGen and AudioGen.
Spleeter
Deezer's pretrained source-separation tool that splits a track into vocals and instruments.