The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

A reimplementation of the instant messaging app seen in Persona 5 for Android using Compose UI.

mGBA Game Boy Advance Emulator

Free, simple, and intuitive online database diagram editor and SQL generator.

Jeffcoin

Esoteric programming language using lyrics from Never Gonna Give You Up

Anime Girls Holding Programming Books

All of my BetterDiscord plugins. If you require support for them, join my Discord server. https://discord.gg/NYvWdN5

文言文編程語言 A programming language for the ancient Chinese.

Manga & Anime Downloader for Linux, Windows & MacOS

A modern open-source online judge and contest platform system.

A modern, open-source online judge frontend.

A simple but powerful anime downloader and streamer.

General Resources for Competitive Programming

Competitive Programming Solutions to various DMOJ Problems

A free collection of curated, high-quality resources to take you from Bronze to Platinum and beyond.