This app was mentioned in 3 comments, with an average of 1.33 upvotes
If you like Commodore 64 there is a great emulator that I use:
https://play.google.com/store/apps/details?id=com.explusalpha.C64Emu&hl=en_US
This is a GREAT emulator I would HIGHLY recommend it to anyone interested in playing C64 games. The ROMS are FREELY available from multiple sites online. Here is just the first search result from Google but probably the best although there are many sites like this:
http://www.c64.com/
And here is a link to the emulator, it's not free but it is cheap:
https://play.google.com/store/apps/details?id=com.explusalpha.C64Emu
Try C64.emu.