To be a practical Arduino simulator
Oric-1/Atmos/Telestrat/Pravetz 8D Emulator
A Z80 emulation library
Apple1 Emulator for the terminal with cut and paste.
Mainframe Emulator - Mirror of http://www.hercules-390.org/
A virtual ethernet adapter
MILE - MIPS Interactive Learning Environment
Gelide, a configurable frontend for desktops.