SflPhone – SoftPhone for GNU/Linux

SflPhone – The free software enterprise-class SoftPhone

SFLphone is a robust, standards-compliant enterprise softphone, for desktop and embedded systems. It is designed to handle several hundred calls a day.SFLphone is one of the few soft phones under Linux to support Pulse Audio out of the box. The Ubuntu documentation recommends it for enterprise use because of features like conferencing and attended call transfer. It has been named by CIO magazine among the 5 open source VoIP soft phones to watch.

Grumblr- Micro-blogging platform

Grumblr is a Tumblr micro-blogging platform client for a GTK-freindly desktop environment like GNOME, XFCE, LXDE, etc. With Grumblr you can post text messages, links, quotes, chat logs, upload photos, audio and video files right away from your desktop.

Hotot - Micro-blogging desktop client

Hotot is a micro-blogging desktop client for Twitter as well as Identica, developed in Python as an open source application. Despite the fact that it is still in its early stages of development, as stated on the official website, it has succeeded to achieve the "Best Linux Twitter Client" in a poll published on WebUpd8.org

BaShare / Basic Share - LAN File Sharing Tool

BaShare (Basic Share) - is a very simply and user-friendly file sharing tool over the Internet and private LAN too. Basically BaShare is a http server with a graphical user interface (GUI). Select a file, give the link to your friends and they will be able to download the file from you speedily. BaShare is very useful during chat sessions!