Media Center Master - Smooth, powerful interface to organize your media collection.
Taiga - Project management platform for agile developers & designers
Ember Media Manager - Ember Media Manager is just that: a media manager.
Shoko Server - Automate your anime collection.
tinyMediaManager - A multi OS media manager written in Java/Swing
anitrack - Scrobbles what you're watching with MyAnimeList and Kitsu.