Gwibber - Gwibber is an open source microblogging client for GNOME developed with Python and GTK.
HootSuite - Enhance your social media management with Hootsuite, the leading social media dashboard. Manage multiple networks and profiles and measure your campaign results.
Socialite - History Ever since we acquired Socialite from Realmac Software in December 2010, we have been planning on releasing a faster, more stable version 2.
Earthquake - Terminal-based Twitter Client with Streaming API support. Only supports Ruby 1.9 and later.
Seesmic - Seesmic was a suite of freeware web, mobile, and desktop applications which allowed users to simultaneously manage user accounts for multiple social networks, such as Facebook and Twitter.
AndStatus - A client for Twitter, Mastodon, GNU Social and Pump.io