Zenity - Zenity is a tool that allows you to display GTK dialog boxes in commandline and shell scripts.
Zoho Meeting - Free video conferencing, online meeting, desktop sharing solution from Zoho.
Yad - Yad (yet another dialog) is a fork of Zenity with many improvements, such as custom buttons...
Airtime - Hang out with group video, share music & videos
Glade - Glade is a RAD tool to enable quick & easy development of user interfaces for the GTK+ toolkit...
Voxox CloudPhone - Get a local or toll-free business number that automatically answers, routes and transfers calls, plus other professional business phone services.