Yace64 is a new emulator for c64 with spcial features. Indeed it tries to transform its vvideo game or however graphic in 3D to be compatible with virtual reality. Sort of Tron software.
This is Commodore 64 code and memory debugger that works in real time. It is quick prototyping tool where you can play with Commodore 64 machine and its internals.
DefleMask is a cross-platform tracker (runs on Windows, Mac OS X and Linux) for producing music for many soundchips and old school game-consoles/computers.