LuLu is the free open-source macOS firewall

A window management application (replacement for Divvy/SizeUp/ShiftIt)

Per-device scrolling prefs on macOS.

A screensaver for Mac OSX / macOS that plays animated GIFs and APNGs

A simple API for interacting with Sonos speakers on a local network.

Mute or unmute your MacBook based on your current Wi-Fi network

On-screen MIDI keyboard with hotkeys support