StretchPlayer will play back an audio file and allow you to time stretch (without affecting pitch) and/or pitch shift (without affecting the time) the audio, even while you are listening to it.

Gpredict is a real time satellite tracking and orbit prediction program for the Linux desktop. It uses the SGP4/SDP4 propagation algorithms together with NORAD two-line element sets (TLE).

Cecilia is an audio signal processing environment aimed at sound designers. It lets you create your own GUI using a simple syntax and comes with many original built-in modules and presets for sound effects and synthesis.

GPicView is a lightweight GTK+ 2.x based image viewer with following features:

LibreOffice is a full-featured office productivity suite that provides a near drop-in replacement for Microsoft(R) Office.