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!
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.
TitanTV - TitanTV is a website which offers free, customizable TV channel listings.
TVGuide.com - Download the app USA Today calls “invaluable” and Time lists as one of 50 Must-Have Apps.
Trakt.tv - Automatically track TV shows & movies you're watching.