Catfood Follower is a desktop Twitter tool for following new friends that follow you and removing friends that don't follow you back. Follower supports Windows XP, Vista and 7.
Download Catfood Follower (Current version: 1.40.0147)
After installing please read Getting the most out of Catfood Follower.

Why auto-follow?
I have multiple twitter accounts. My personal account (@abfo) doesn't auto-follow. If you look interesting and not obviously spammy then I'll probably follow you back. Catfood Software (@CatfoodSoftware) will follow you backup using Catfood Follower. I've no idea if followers are Catfood customers or not so I want to follow everyone that signs up for Catfood updates.
Why auto-remove?
Twitter makes it hard to tell when someone you're following removes you. The auto-remove feature of Follower checks for friends who don't follow back and removes them. You can exclude users who you want to follow regardless.
How to use Catfood Follower
Follower supports multiple twitter accounts. For each account you can decide if you want to auto-follow, auto-remove or both. The screenshot above shows the settings for a single account.
You can add exclusions for both auto-follow and auto-remove. For auto-remove you can also set how many days to wait before removing a friend who is no longer following you. This prevents Follower from automatically removing new friends who haven't had a chance to follow you back yet.
Once you've entered rules for each account click the Test button on the main window. You can run the rules in test mode to see who would get followed and removed, or run in live mode to actually process the rules.
You can just run Follower manually when you want to run the rules, or you can use Task Scheduler to run it automatically. To schedule Follower (on Vista) run Control Panel -> Administrative Tools -> Task Scheduler. Click Create a Basic Task and follow the Wizard to set the schedule (i.e. once a day). If you accepted the defaults during installation then the path to Follower is "C:\Program Files\Catfood Software\Catfood Follower\Follower.exe". Running Follower with no arguments will automatically process the rules that you entered in Catfood Follower Settings. There is no display when Follower is running automatically.
Need Help?
If you have any problems or questions send me an email. If you have any feature suggestions please leave a comment below.
(Updated 2009-05-04 to 1.00.0108: Fixed a problem where new exceptions for an account were not processed, this led to Follower auto-removing exceptions. Also, the installer is now digitally signed.)
(Updated 2009-06-25 to 1.00.0122: Handle a twitter API bug with returning the correct number of friends/followers per page this is a critical update, added logging.)
(Updated 2009-07-21: Note that Follower does not follow new users for you. If you're looking to do this check out Twiogle Twitter Friend Adder.)
(Updated 2009-12-12 to 1.10.0061: Improved API limit handling, progress window during automatic processing, can now cancel and update. See Catfood Follower 1.10 for more information.)
(Updated 2010-03-16 to 1.20.0019: Fixed a bug related to location data in tweets. Added follow/unfollow limits to account settings. See Catfood Follower 1.20 for more information.)
(Updated 2010-09-02 to 1.30.0051: Updated from basic auth to XAuth - this is a critical update, added manual step for removing followers (unfollowing).)
(Updated 2011-11-06 to 1.40.0147: Added support for Klout and Twitter Lists. See Catfood Follower 1.40 for more information.)