Trakter - TV Shows and Movies for Windows
BuddyTV Guide - "Why try the others?! BuddyTV Guide is the top rated TV guide application in the iTunes Store.
Trakt.tv - Automatically track TV shows & movies you're watching.
TitanTV - TitanTV is a website which offers free, customizable TV channel listings.
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.
TV Calendar - Track an unlimited amount of TV shows with PogDesign's TV Calendar.