Gwibber - Gwibber is an open source microblogging client for GNOME developed with Python and GTK.
SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.
Choqok - Choqok - KDE Micro-Blogging Client The name comes from an ancient Persian word, means Sparrow!
Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
PyCharm - Python & Django IDE with intelligent code completion, on-the-fly error checking, quick-fixes, and much more...