Battle.net Optimizer - This is a Battle.net Optimizer, it checks all the servers three times to see which one is the fastest. It helps you log onto battle.net faster.
Battle.net Buddy - This lets you see if any of your friends are on battle.net. It lets you pick the servers and message your friends.
Topaz Chat - This is a bot. A chat program that allows you to chat on battle.net without having to own any of blizzard's games. It's easy to use and allows you to pick the server to log on with.