Retro Virtual Machine emulates the Amstrad CPC, Colecovision, MSX-1, ZX Spectrum, SG-1000 and Sega Master System. I found this emulator a little confusing to use, but after figuring it out, I found it quite intuitive.
* Quality graphical effects
* Drag and drop a zip file with your entire collection onto the machine and quickly search for your favorite games.
* Emulates a Virtual Cassette player that can be played back and recorded in different formats, at real speed or, using warp mode, at a higher speed.
* High quality audio and gamepad support.