01Open source
Repos
Open-source repos worth knowing, by the problem they take on.
AI & Agents
Halo Training Framework
Open-source framework from White Circle for training large language and multimodal models, supporting pre-training, SFT, preference optimization, and asynchronous RL. Runs on one GPU or multiple nodes with distributed training features.
Open Edit Pipeline
Open-source, agent-driven video editing pipeline that creates subtitles, motion graphics, slides, and renders videos without a GUI. Works with Claude Code, Codex, or Gemini CLI on Apple Silicon or Windows.
Halogen Flash Server
Specialized inference server optimized exclusively for Qwen3.8-Flash-Next on AMD Strix Halo hardware. Achieves high throughput through hand-written kernels for this single GPU and model combination.
TypeSafe Computer Use
Computer use tool that drives macOS via OCR and action classification at roughly $0.0002 per step. Uses deterministic code for facts and only calls a writing model for free text.
AI Agent Skills
Reusable AI agent skills for software factories, covering ideation, specs, implementation, review, and autonomous research. Works with Claude Code, Codex, and other skill-compatible agents.
Donsetch Web Fetcher
Rust-based web fetch, search, and crawl tool for AI agents that requires no API keys or accounts. Runs as a single local binary with fetch, search, PDF, and stealth capabilities.
Kotlin Footguns Guide
Collection of 224 battle-tested agent skills documenting Kotlin, Compose Multiplatform, and desktop JVM footguns, mined from the production SimpMusic app. Packaged as nine skills plus a scanner.
Data & Databases
PouchDB Database
Apache PouchDB is an open-source JavaScript database inspired by CouchDB that runs in the browser and enables offline-first applications. It is notable for its sync capabilities, which help web developers build apps that work offline as well as online.
MariaDB Server
MariaDB Server is a community-developed fork of MySQL, led by the original MySQL team. It is notable for its broad deployment, MySQL compatibility, and recent addition of native vector search and analytical features.
Dexie.js Wrapper
Dexie.js is a minimalistic wrapper library for the browser's IndexedDB database. It is notable for its excellent TypeScript support, workarounds for browser bugs, and optional Dexie Cloud sync service.
Beekeeper Studio
Beekeeper Studio is a cross-platform SQL editor and database manager for MySQL, Postgres, SQLite, SQL Server, and more. It is notable for its modern, easy-to-use interface and free, no-signup community edition.
pgcli Postgres CLI
pgcli is a Postgres command-line client with autocompletion and syntax highlighting. It is notable as a best-in-class, daily-use tool for database developers.
Go MySQL Driver
go-sql-driver/mysql is a MySQL driver for Go's database/sql package. It is notable as the de facto standard, battle-tested MySQL driver for Go applications.
mycli MySQL CLI
mycli is a MySQL terminal client with auto-completion, syntax highlighting, and dataframe integration. It is notable as a practical, well-maintained tool that supports MySQL, MariaDB, Percona, TiDB, and Apache Doris.
Dev Tools & CLI
Barrage Load Tester
Barrage is a load testing tool that drives concurrent HTTP, database, and Redis load on a single clock, correlating latencies to identify bottlenecks. It is notable for its shareable HTML report that flags exactly which layer and time bucket spiked.
RestoreDrill Backup Validator
restoredrill proves PostgreSQL and MySQL backups actually restore by fetching the latest backup, restoring it into a throwaway container, and running defined checks. It is notable for its high practical value, addressing the common gap of untested backups with a JSON report.
Ritridata Disk Inspection
Ritridata is a read-only Rust toolkit for MBR/GPT partition inspection, public file signature definitions, and synthetic disk image generation. It is notable as a specialized, offline DFIR utility for answering partition structure and file format questions.
TSK Task Board
tsk is a terminal-based shared task board offering a TUI for humans and a CLI for agents, serving as a Linear alternative. It is notable for its dev-agent workflow integration, keeping tasks, work in progress, and waiting items visible.
Jevgrep Code Search
Jevgrep is a CLI for coding agents that finds relevant code by asking repository questions, returning files, reading leads, and source excerpts. It is notable for completing 8 of 10 SWE-bench tasks at roughly 30% lower cost than its baseline.
Harbor GitHub Workspace
Harbor is a focused desktop workspace for GitHub notifications, issues, pull requests, Actions, and repository discovery, with an optional repository-aware agent. It is notable as an early Tauri-based client for power users, now renamed Repolane.
Jgrep Meaning Filter
jgrep filters lines by meaning using TypeSafe's Jev decision model, treating each line as a yes/no question against a description. It is notable for providing fast semantic grep at roughly 200 ms and a thousandth of a cent per line.
Embedded & Hardware
KryonOS ESP32 GUI
KryonOS is an open-source GUI operating system and JavaScript app platform for ESP32 and ESP32-S3, enabling dynamic app installation without reflashing. It provides real firmware engineering with hardware APIs, file management, and an app store.
LakeShark SDR Scanner
LakeShark is a handheld SDR scanner and radio workbench built on the LilyGO T-Display P4 ESP32-P4, decoding RTL-SDR signals like P25, ADS-B, and POCSAG plus LoRa and GPS without a PC. It is notable as a substantive, self-contained field tool for radio analysis.
Halo AI Firmware
Halo-firmware is the Zephyr RTOS firmware for Brilliant Labs' AI glasses, running on the Alif Balletto B1 with a Lua runtime for on-device apps and BLE OTA updates. It is notable as real product code that supports user-built firmware flashing over the air without vendor tooling.
Pocket Tank LLM
Pocket-tank runs a 14M-parameter LLM, distilled from a 26B teacher model into 7.56 MB, entirely on an ESP32-S3 to control a virtual fish tank. It is a novel demonstration of embedded on-device AI with no network or cloud dependency.
ZamSync Sync Engine
ZamSync is a resilient offline-first sync engine using WAL replication, Hybrid Logical Clocks, version vectors, mTLS, and ChaCha20-Poly1305 encryption at rest. It is built for intermittent-connectivity deployments like IoT, rural health, and edge environments.
IoT Firmware Analysis
IFDA automates reverse engineering and vulnerability discovery for IoT firmware binaries, implementing an analysis core with a bilingual web UI and Go service layer. It is valuable security tooling for defensive or authorized firmware assessment.
fnprint Function Fingerprinting
fnprint matches functions in binaries by their behavior, using microexecution to record side effects and hash them into fingerprints, rather than comparing bytes or control-flow graphs. This makes it novel for binary diffing across compilers, optimization levels, and CPU architectures.
Finance & Quant
Index Constituents Tool
Index-constituents is a tool for retrieving current and historical stock index constituents, with symbols aligned to Yahoo Finance. It is notable as a focused, useful resource for quant researchers needing index membership data.
Wickra Technical Indicators
Wickra provides streaming-first technical indicators implemented in Rust with Python, Node.js, and WebAssembly bindings, plus a C ABI. It offers O(1) per-tick updates and serves as a drop-in TA-Lib replacement with no system dependencies.
QuantStats Portfolio Analytics
QuantStats is a Python library for portfolio performance analysis, risk metrics, and tear-sheet reports. It is notable as a widely adopted, actively maintained tool for quantitative portfolio managers.
XQShare Remote Execution
XQShare is a lightweight remote execution solution that lets macOS/Linux users call xtquant-style APIs from Python against a Windows-hosted QMT client. It stands out for transparent, authenticated remote access to Chinese quant trading infrastructure.
Game Dev
Blocks Beyond Stars
A block-based 3D space crafting game with procedural planets, mining, crafting, ship/base building, and solo or multiplayer play. It uses an open-source .NET server and Unity client, and supports self-hosting.
GMNav Pathfinding
A pathfinding and navigation library for GameMaker written in pure GML. It includes resumable A*, flow fields, cost fields, clearance, isometric and hex grids, and platformer jump arcs, filling a significant gap for GameMaker developers.
UltraGameStudio AI Agent
An AI coding agent for game development that handles engine workflows, gameplay code, and asset generation across images, 3D models, audio, and more. It aims to route routine work through cheaper AI channels to save premium quota.
Operation Steel Tide
An open-source Godot 4 tactical extraction FPS set in Jianghai Old City featuring AI squadmates, online co-op, persistent loot, and a separate 5v5 demolition mode. It is notable for its ambitious feature set in an open-source project.
Constellation Dice
A Unity URP shader that renders a glass die containing a nebula and per-face constellations in a single raymarch pass on a default cube. It demonstrates focused graphics engineering with minimal geometry and no Shader Graph.
Patter Dialogue Flows
An editor, compiler, and runtimes for writing and running dialogue flows in games. It is notable for its spoken-line-first approach with stable IDs for VO and translations, and provides runtimes for JavaScript, Unity, Unreal, and Godot.
Security
Cybersecurity Learning Platform
AG Cyber Lab is an open-source cybersecurity learning platform with structured lessons, guided labs, and progress tracking. It uses a custom lab engine to build foundational technical skills for beginners, focusing on understanding over tool memorization.
WordPress Path Traversal
This repository provides a proof-of-concept for CVE-2026-87902, an unauthenticated path traversal in WordPress Core enabling local PHP inclusion and conditional RCE. It includes a pinned vulnerable lab, making it timely and practical for testing.