LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
volt.fm - See your Spotify stats, connect with 125k+ music fans, and discover new music.⠀volt.fm helps you experience Spotify in a totally new way.
SmallDevTools - Handy developer tools with a delightful interface
BeatFlyer - Create eye-catching videos in a few clicks with powerful visual effects that can sync to the music
GitHub Student Developer Pack - The best developer tools, free for students.
Principle - Principle makes it easy to create animated and interactive user interface designs.