TweetDeck is a popular third-party application programs that help Twitter users view and manage their tweets. TweetDeck has emerged as a favorite of heavy users of Twitter, letting people track tweets about multiple topics at the same time. The program, which many people download and use on their desktop computers, also lets people write tweets longer than 140 characters, among other features.
Twitter has encountered some static recently because developers fear Twitter now wants to clamp down on third-party apps that compete with features Twitter believes should be a core part of Twitter itself.
Google has encountered somewhat similar issues recently over new releases of Android, which some developers say Google develops in "too closed" a manner.
