Lembraco is a graphical editor that lets you load or create a 3D object and change its properties. Lembraco can load a midi file or listen to an external midi source. The incoming midi values are filtered and passed to the engine for event handling.
qliss3d renders 3d-Lissajous-figures (figures made of a different sine functions for each dimension) with a Qt interface. You can look at the figures from any viewing position you like and even "listen" to the sound of the figures.