MALClient - MALClient is 3rd party app for managing your anime and manga list on MyAnimeList.
AniList - AniList is a tool to track and record your progression in anime and manga, featuring multiple...
Taiga - Project management platform for agile developers & designers
Kitsu - Kitsu is the easiest way to track, share and discover new anime and manga.
anitrack - Scrobbles what you're watching with MyAnimeList and Kitsu.
AniDB - AniDB is a non-profit anime database providing you with all information regarding anime.