Aliados is a CP/M 80 emulator. Instead of emulating a machine and running some variant of CP/M on it, it emulates only the microprocessor and captures all CP/M system calls to execute natively. It does not need to create disk images, but reads and writes on the native filesystem all files that match the CP/M naming conventions.
ADTPro transfers disks to and from Apple II and Apple /// computers and the modern world using any of these communications methods: serial/USB, UDP via the Uthernet or LANceGS Ethernet cards, or audio via the Apple's cassette ports. ADTPro has comprehensive bootstrapping support for otherwise diskless Apple IIs. The home page includes extensive tutorials for getting started.
Avrora is a set of tools for programs that run on the AVR series of microcontrollers produced by Atmel. It contains a flexible framework for simulating, analyzing, and optimizing assembly programs, and provides a clean Java API and infrastructure for experimentation, profiling, and analysis.