H.323 and SIP compatible VoIP client

ekiga

H.323 and SIP compatible VoIP client

H.323 and SIP compatible videoconferencing and VoIP/IP-Telephony application that allows you to make audio and video calls to remote users with H.323 hardware or software (such as Microsoft Netmeeting) as well as SIP endpoints.
Tool to tag and rename MP3 and Ogg Vorbis files

tagtool

Tool to tag and rename MP3 and Ogg Vorbis files

Audio Tag Tool is a program to manage the information fields in MP3 and Ogg Vorbis files (commonly called tags). Tag Tool can be used to edit tags one by one, but the most useful features are mass tag and mass rename. These are designed to tag or rename hundreds of files at once, in any desired format.
GTK+ performance benchmark

gtkperf

GTK+ performance benchmark

GtkPerf is an application designed to test GTK+ performance. The point is to create common testing platform to run predefined GTK+ widgets (opening comboboxes, toggling buttons, scrolling text) and this way define the speed of device/platform.
Emilia Pinball Emulator

pinball

Emilia Pinball Emulator

The Emilia Pinball Project is a pinball simulator for GNU/Linux and other Unix systems. There are only two levels to play with, but they are very addictive.
Juk, with the Breeze Dark theme, playing an album and displaying lyrics

juk

music jukebox / music player

JuK is a powerful music player capable of managing a large music collection.
Optimize laptop battery life

tlp

Optimize laptop battery life

TLP is a feature-rich command-line utility, saving laptop battery power without the need to delve deeper into technical details.