The Registry Drill is the most in-depth Registry cleaner available today. It goes through the Registry character by character searching for any possible errors. The Drill has several main components, the Quick Drill which quickly searches the Registry for 15 different possible types of errors that other Registry cleaners do not. The Deep Drill goes through the entire Registry slowly and carefully looking for more than 50 different kinds of errors
Registry Vaccine - Registry Vaccine is an advanced and extremely effective desktop protection utility that protects a PC's registry from errors; thus enhancing the PC's performance.
Price: $19.95, Rating: 8, Downloads: 121 Download
Generates/Validates Credit card Numbers. Note that this program should be used for educational purposes only.
Price: $19.95, Rating: 8.81, Downloads: 101 Download
RegistryEasy is a Windows Registry Cleaner, Kernel32 DLL Error Message Fix and Access Violation Repair Software. FREE PC Scan will identify All Errors, Missing Files and Fonts; Invalid Shortcuts, Application Paths, Drivers; and more Windows Errors.
Price: $34.95, Rating: 1.83, Downloads: 85 Download
RTKF puts powerful registry cleaning tools into your hands. It quickly finds unwanted registry data. You may then safely delete orphaned keys and other "rubbish" that's frequently left behind by "trial" software.
Price: $0, Rating: 9, Downloads: 78 Download
NT Registry Drill - details 
