Digital Soda is a simple GTK+ frontend for the "DSO-2250 USB" oscilloscope.
OpenHantek is an application for controlling Hantek (Voltcraft/Darkwire/Protek/Acetech) USB DSOs based on HantekDSO. It draws charts using OpenGL and allows triggers, time base, math functions, and other settings to be manipulated.
A generator of all major barcode formats entirely within Postscript.
A LED matrix controller.