Saturn 3D Space Tour 

Saturn's ring system makes the planet one of the most beautiful objects in the solar system. It was difficult to reflect it's beauty by computer simulation, but using modern 3D technologies we tried to gain maximum possible realism in this animation.
space saturn 3d accelerated screensaver screen saver animated opengl

Dexterpen 

Dexterpen is a stand-alone Windows graphics utility for those small repetitive 2D tasks which take away valuable time from your working day. Use it to create 2D drawings and do CAD and graphical calculations simply by moving the sliders.
graphics cad utility parametric dxf calculation