Top FAST GitHub Repositories & Tools (2026)

Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 20% fewer tokens for coding agents, 60-95% fewer tokens for JSON, same answers. Library, proxy, MCP server.

FastAPI framework, high performance, easy to learn, fast to code, ready for production

Free and open-source PDF editor for Windows with a built-in PDF 2.0 engine. View, annotate, OCR, merge, split, crop, rotate, compare, edit text, draw, sign, fill forms, print, flatten, and open password-protected PDFs without a subscription.

a fast, scalable, multi-language and extensible build system

Fast and low overhead web framework, for Node.js

The only browser automation that bypasses anti-bot systems. AI writes network hooks, clones UIs pixel-perfect via simple chat.

Extremely fast, in memory, serialization, reflection, and RPC library for C++. JSON, BEVE, BSON, CBOR, CSV, JSONB, MessagePack, TOML, YAML, EETF

PipesHub is an open-source platform for securely connecting enterprise knowledge to AI. Give AI agents trusted context and your team permission-aware search with verified citations across your business systems.

Real-time intraday stock scanner for US equities with a browser dashboard you lay out yourself

Who the good traders on Robinhood Chain are buying: resolved wallets, a 20-second on-chain tape, provenance on every fill, AI verdicts, bursts and exits. Site + Telegram bot + API. Runs on $0/month.

Fud AI — free & open-source AI calorie & workout tracker for iOS and Android. Privacy-first, local-first, bring your own key.

An AI Gateway, registry, and proxy that sits in front of any MCP, A2A, or REST/gRPC APIs, exposing a unified endpoint with centralized discovery, guardrails and management. Optimizes Agent & Tool calling, and supports plugins.

🚀 The fast, Pythonic way to build MCP servers and clients.

Local-first AI trading journal. Import your broker CSV, get round-trip trades, KPIs and Claude-powered diary analysis. Runs on your own machine. No account, no telemetry, MIT.

Super-fast/easy runtime validators and serializers via transformation

A proxy server for adding push to your API, used at the core of Fastly's Fanout service

A fast, lightweight and more productive microservices framework

The most complete DDS - Proven: Plenty of success cases. Looking for commercial support? Contact info@eprosima.com

Implement GraphQL servers and gateways with Fastify

🔥 Insanely fast native C++, Swift or Kotlin modules with a statically compiled binding layer to JSI