Below is a list of utilities that will enhance your Google AdSense experience.
Ads Black List (main page)
Description: Generates a custom list of those pesky MFA sites.
Cost: Free basic membership (requires registration)
AdSense Earnings WordPress Plugin (download page)
Description: Check your earnings in your DashBoard or Options page for specific time period. Show to the public how many $ do you have for today (optional).
Cost: Free
AdSense Log (download page)
Description: Automatically check your AdSense statistics. Lots of graphics.
Cost: Free to try ($50 to buy)
AdSense Notifier for FireFox (download page)
Description: Displays your AdSense earnings on the Firefox status bar.
Cost: Free
AdSense Status (download Page)
Description: AdSense Status is a plug-in for the Google Desktop sidebar. It displays information from AdSense for Content, Search, and Referrals.
Cost: Free
RevCheck (download page)
Description: Automates the repetitive task of logging in and checking your AdSense stats.
Cost: $29.95 (Promo $14.95)
SysSense (download page)
Description: SysSense is a personal desktop Google AdSense monitor. It keeps your current Google AdSense information in the Windows system tray.
Cost: Free (my favorite)