Its been a while since i went looking for free and legal roms (aka Public Domain roms) but today i have a new Rom pack with 56 roms/demos etc for the 16bit handheld the Atari Lynx, those interested can also find freeware/legal roms for the following systems:

Atari 2600
Colecovision
Commodore 64
Gameboy
Gameboy Advance
Genesis
Intellivision
NeoGeo Pocket
Nes
Nintendo 64
PC Engine
Snes
Spectrum
Vectrex
Wonderswan

Get those roms from this Page