via http://www.aep-emu.de/
Marat Fayzullin has ported his (free) Spectrum emulator Speccy to the Android platform: Speccy for Android
Quote:
New in 1.7.23:
- Added menu option to invoke built-in debugger.
- Added menu options to rewind, start, and stop tape.
- Added Japanese and Russian translations.
- Added configurable frame skip setting.
- Enabled browsing from the file system root.
