Gwibber is a Linux twitter client work with GNOME and developed with Python and GTK. It supports also other mircoblogging services like Jaiku and Identi.ca. And social networks as well like Facebook, Flickr and Digg. Also support using RSS feeds.
Gwibber is an open-source app under GNU license and available on LanuchPad.
Pros & Cons
|Supports many micro-blogging and social networks services|
|Free and open-source app|