Who's in the Bag?
Game in which each team tries to identify as many personalities on the cards as possible before the timer runs out and the bag or hat passes to the next team.
http://www.whosinthebag.com/

Yankee-Swap.net
Gift-giving party game suitable for small to large groups. Offers free download of the official rules for a Yankee Swap in PDF format.
http://www.yankee-swap.net/

The Pumpkin Shell
Ebook featuring information, ideas, and themes for planning and hosting a scavenger hunt game. Other ebooks offered include 25 party games, and kids craft recipes.
http://www.thepumpkinshell.com/

The Screen Test Game
Home video camera game in which teams perform short movie scenes. Includes instructions, tip list, and purchase information.
http://www.screentestgame.com/