Top DEVELOPER GitHub Repositories & Tools (2026)

Turns the documentation you already write into tests that run. A failing test means your product and your docs disagree, and names the section.

Menu Bar App on MacOS and Windows that cuts Claude Code and Codex token costs by ~50%

A powerful browser extension that supercharges DeepSeek Chat with custom tooling, persistent memory, and seamless project scaffolding. Generate and download files, run Python in-browser, create PowerPoint and Excel documents, build multi-file projects as ZIP archives, and manage custom skills and characters.

Multi-workspace terminal aggregator with Claude Code AI integration

AI pair programming in your terminal — one static binary, sub-ms startup, any model

Hive Console is part of the Hive GraphQL platform. Schema registry and analytics for GraphQL federation and other GraphQL APIs

Chrome extension to add a metadata layout on top of the standard Salesforce UI to improve the productivity and joy of Salesforce configuration, development, and integration.

Structural code intelligence for AI agents — semantic search, knowledge graphs, and a built-in MCP server in one Rust binary. Give Claude, Cursor, and any MCP client a deep understanding of your codebase.

Use CircleCI from the command line

File-backed workflow harness for reliable Claude Code and Codex sessions.

Every file not opened. Every folder not explored. Tokens saved. ProjectAtlas guides coding agents with purpose metadata and an intelligent code graph, reducing token costs by over 90%.

Structured skill framework for Claude Code. 130 skills, persistent memory, TokenStack compression, localhost dashboard with 3-agent runner, real-time streaming, MCP tools.

Smithers is an agentic workflow framework for defining workflows in simple TypeScript configuration files and executing them quickly, durably, and reliably

Git-native persistent memory for AI coding agents. Implements Google OKF v0.2 with sub-300µs in-memory BM25 search, embedded MCP server, and progressive disclosure. Slashes token bloat by 80% with zero external databases or dependencies. Built in pure Go.

A self-hosted workspace where people and coding agents work together across projects, sessions, and providers.

Open-source workspace manager for AI coding CLIs: Claude Code and ChatGPT Codex in one browser app. Discovers every session on disk, embedded terminals, phone-ready, cost tracking, kanban, docs. Windows, macOS, Linux.

Open-source AI pair programming for desktop: a Mentor + Executor agent cross-check each other's code to catch AI hallucinations. Works with Claude Code, Codex, Gemini & opencode. macOS / Windows / Linux.

DOMjudge programming contest jury system

Generate :octocat: Stats as like Terminal Interface with typing effects dynamically for your profile Readme

Run Claude Code, Codex, and Gemini side by side — each in its own git worktree