System/Registry
shareware
Ashampoo WinOptimizer
Ashampoo WinOptimizer is an easy-to-use suite of tools for maintaining and optimizing your Microsoft Windows computer. It keeps your Windows installation free of unnecessary garbage and running smoothly while other computers just get slower and slower.
freeware
Eusing Free Registry Cleaner
Eusing Free Registry Cleaner will scan your Windows registry for invalid or obsolete information and provide a list of the errors found. After fixing the invalid entries, your system will be more stable and run faster. For maximum safety, Eusing Free Registry Cleaner will make a backup of the repaired entries. You will be able to restore any changes made using the software by choosing Restore registry backup.
freeware
ProduKey
ProduKey is a small utility that displays the ProductID and the CD-Key of MS-Office, Windows, Exchange Server, and SQL Server installed on your computer. You can view this information for your current running operating system, or for another operating system/computer - by using command-line options. This utility can be useful if you lost the product key of your Windows/Office, and you want to reinstall it on your computer.
freeware
Quicksys RegDefrag
Quicksys RegDefrag is a freeware utility to defrag your registry. It optimizes registry by removing gaps, fragments and wasted space in Windows registry files. The defragmentation improves performance and boosts access to the registry.
shareware ($30}
Registry Workshop
Registry Workshop is an advanced registry editor. It is a perfect replacement for RegEdit and RegEdt32 which shipped with Windows. In addition to all the features that you can find in RegEdit and RegEdt32, this offers many power features to enhance registry editing. You can cut, copy and paste registry keys and values. You can undo and redo modifications. You can search and replace registry keys, values and data quickly and easily. It allows edit registry files in the same way as editing system registry....
freeware
RegScanner
RegScanner is a utility that allows you to scan the Registry, find the desired Registry values that match to the specified search criteria, and display them in one list. After finding the Registry values, you can jump to the right value in RegEdit, by double-clicking the desired Registry item.
freeware
RunScanner
RunScanner is a completely free windows system utility which scans your system for all configured running programs. You can use runscanner to detect autostart programs, spyware, adware, homepage hijackers, unverified drivers and other problems. You can import and export your results and let other people help you to solve your problems.
freeware
Registry Life
Registry Life is a utility for speeding up the system by fixing the registry errors, compression and defragmentation the registry. Registry cleanup function performs search and repair of a vast number of different registry problems. Unlike other programs, the software performs the registry optimization on system startup. Defragmentation and compression in automatic mode can be performed according to a schedule set by the user.