Games For Your Website
http://www.gamesforyourwebsite.com/
About 50+ flash games you can add to your site or MySpace page. Download the zip file to host the games from your server. Comes with game thumbnails.

Ultimate Arcade
http://www.ultimatearcade.com/downloads/
Nice selection of flash games. Download the zip file and you're ready to go. No registration is required and a few different options are provided.

MiniClip
http://www.miniclip.com/games/en/webmaster-games.php
A large selection of flash games you can download and add to your website. Nice site with quality games. Highly recommend this one

Free Games for Your Website
http://www.freegamesforyourwebsite.com/
Embed the games into your own pages. Each game comes with several thumbnail images (.jpg), the actual game files (.swf or .dcr), a sample html code file (.html) and instructions of how to add the games to your website (.txt), all compressed in a .zip file.

The PCman Website
http://www.thepcmanwebsite.com/affiliate_games.shtml
Copy and paste the code of each game you want to add to your page. If you prefer, you can link to the page that lists all of the available games. Also you don't have to use your web space or monthly traffic allowance(bandwidth) and any bug fixes or updates are automatically done. No limit to the amount of games you use, and with a little work you can fit them into your website's theme. The pages open into a new window with no tool bar, address bar or status bar so your visitors won't realize they went to another site.

Free Flash Games for Your Website
http://www.flashgamesforyourwebsite.com/
As the title suggests this site offers a number of flash games you can download as hotlinks or embed into your own website. Includes full .swf file, sample html file and thumbnail.

Free World Group
http://www.freeworldgroup.com/koalafiles.htm
Flash games you can download and host from your website.

Grooveynet
http://groovynet.com/4webmasters/freegames.htm
Java games hosted off-site. Links open in a new window so visitors never leave your site.

CrazyMonkeyGames
http://www.crazymonkeygames.com/download.php
Nice selection of flash games you can download and place on your site. No sign up or registration.

My Play City
http://www.myplaycity.com/free_content/free_online_games.html
More flash games you can download and place on your site. No sign up or registration.