KeyCastr, an open-source keystroke visualizer

Staggeringly powerful macOS desktop automation with Lua

Mac app that shows all open files, directories, sockets, pipes and devices in use by all running processes. Nice GUI for lsof.

Manage your Homebrew formulas with style using Cakebrew.

Style iOS apps with a stylesheet, similar to CSS

A Fast, Open Source JavaScript, Canvas & Audio Implementation for iOS

Google Toolbox for Mac

Convert an iOS Simulator app bundle to an iOSMac (Marzipan) one (Unsupported & undocumented, WIP)

Objective-C Game Development Suite

A super simple retina (2x, 3x) image converter.