Nostalgic sites:
The sites listed here are basically dedicated to general memories about the 8/16 bits, and while they're not download packed, you'll find that they offer some good information to browse through :).

The Nostalgia MineAlthough possessing a dissapointing colour scheme on the main page, this site is setup like an online magazine, and as such, is a very good read with some intersting articles (currently including remakes and various game reviews). ExoticaCentered around the Amiga, this site carries a lot of interesting information, with a very large archive of game cover scans, and also has the sound tracks available for the majority of them as well. The Oldskool PCAs the title says, covering the PC, this well designed site carries lots of useful information for PC gamers (such as getting classic games running on Today's PC's), and even has a few articles concerning the C64. You'll certainly enjoy browsing through this.