UAE4ALL is a Commodore Amiga 500 emulator, one of the best released for Symbian architecture since now.
Recommendation is that you run this on a 300 MHz+ S60v3 devices, video wise it's not very well optimized, due to the SDL backend, which is more general than fast.
The product is the a bit slow and quite memory hungry but is progressing well and it benefits also from a bluetooth mouse emulation, and it's also for free.

Source: my-symbian.com