If you want emulators, try doing a search on Google (eg 'SNES emulators'). Of course a lot of sites are closing, due to the big corporations being funny about copyrights etc, but there are a few sites that still supply rom's
Here are a few sites where you can get emulators/games/info - Apologies as I cannot remember some of the URL's, so just put the name into google..
LEMON64 - www.lemon64.com
A great Commodore 64 site with info on alot of games. Also has a very good forum. Only has a few downloads, because of software houses being akward..
WORLDOFSPECTRUM - ????
The premier Speccy site..Info, Utilities, Emulators, over 5,000 games, forums, what more can you ask for?!
CHERRYROMS - ?????
A good SNES site with tons of downloads. The moderators on the forum are a bit facist however!
Hope this helps!!