This transitional package allows one to migrate to kde-spectacle.

You can quickly view and filter arbitrary TTF, TTC, OTF or Type1 font files and then gather them together into 'pogs' which can be installed or removed as needed. In this way you control which fonts are installed on a per-project basis. It is written in Python and WxWidgets.

GTK+ based client for MySQL which allows one to make queries and performs administrative jobs such as manage users, process, structures, data dumps and more.

Bino is a video player with support for a wide variety of stereoscopic video layouts and formats.

With Step you can not only learn but feel how physics works. You place some bodies on the scene, add some forces such as gravity or springs, then click "Simulate" and Step shows you how your scene will evolve according to the laws of physics. You can change every property of bodies/forces in your experiment (even during simulation) and see how this will change evolution of the experiment.