Emulation and abandonware

Generalist emulation:

Amiga Games Roms
Awesome ROMs site where you will find even the most obscure game on Amiga, Atari, C64 and many other systems. Amiga section also include a huge choice of applications, educational games, Boulderdash clones (!!!). . . . Console and arcade games are also present en masse.

Emuparadise
One of the biggest Emulation site around. Almost every platform is present.

ROMNation
ROMs for MAME (arcade), Supernes, Sega Genesis and N64.

Retrobase
The emulation of the first game consoles (Atari, Bandai, Coleco . . .) with ROMs, naturally.

The Game Archives
Games on Amiga, Atari, Amstrad CPC, C64, PC-Engine and many other ancient relics.

Planet Emulation
The French biggest ROMs and news site.

Mondemul
Playstation and Saturn ISOs among other things.

Specialized emulation:

Snes-fr
Supernes emulation.

Zonesega
Sega emulation.

Emerald Web
The largest collection of Boulderdash-like for your Amiga emulator!

Abandonware:

XTCabandonware
One of the biggest abandonware sites.

Bunny Abandonware
Nice selection of games (Dizzy, Zork, Incredible Machine among others. . . .).

The House of Games
The advantage of this site is to present, under each game review, download links for various systems (old computers and consoles). However, I can see no reference to the arcade versions, which are as easy to play with an emulator and so much superior!

Abandonia
Old video games to download. Many reviews and pics.

Classic Gaming Network
A few console game reviews but mostly PC games.

Lost Treasures FR
Large abandonware site (old games on PC and Mac to download). Warning, most of them do not work well or at all with the latest Windows versions (without DOS).

Abandonware Utopia
Another abandonware site.

Free games:

Abandonia Reloaded
Hundreds of homemade games along with reviews, screenshots and ratings.

Jeux-video-gratuits.org
Free quality games.

Commercial sites:

Retro Scene
Online store for classic, retro, vintage or old video games, consoles and computer systems.

Console Passion
UK site selling second hand console games.

CduRetro
Classic gamming store.

Super Game Land
Online store. Mostly console games.

Retro Game Shop
Retrogaming shop located in Paris.