Emu80 by Uto is an new emulator (Spectrum, Amstrad CPC, Spectrum Next, ZX-Uno) with powerful assembly debugger and DAAD/PAW/The Quill debugger. It's really useful if you want to create news adventure games with programs such as DAAD, PAW or the The Quill, don't expect to run demos and very technical games, it's not the goal.