Are you an amstrad fan, well heres a brand new emulator for you, heres the release notes:

SugarBox v0.29 is released. Sugarbox is a new emulator for the Amstrad CPC family.

SugarBox v0.29 Changelog:
* Complete PLUS family support : 464+, 6128+, GX4000. All ASIC functions are supported (making modern demo like CRTC3″ or Eerie forest functionnal).
* SNA v3 is supported, with BRKS chunks (breakpoints generated by RASM or Winape)
* Various fix on full screen management (should not crash anymore)
* Various fix on DSK management. More dumps should be analyzed correctly
* IPF support : Generated IPF file should be more reliable (no more crash with Samdisk or DTC from kryoflux)
* Joystick support is better
* Sound have been reworked.

more here