BuddyTV Guide - "Why try the others?! BuddyTV Guide is the top rated TV guide application in the iTunes Store.
Trakter - TV Shows and Movies for Windows
tvcmd - tvcmd is a command line interface (CLI) to keep track of tv shows and episodes. It has the functionality of myepisodes.com followmy.tv or mytvshows.org but for the command line, allowing greater flexibility like automatic torrent urls.
Trakt.tv - Automatically track TV shows & movies you're watching.
TV Calendar - Track an unlimited amount of TV shows with PogDesign's TV Calendar.
TV Show Tracker - Manage your TV shows on phone or tablet - seasons, details, casts and much more!