Ainvo Registry Defrag will allow you to improve the Windows performance and stability due to registry defragmentation. No longer available for download but we have many other listings in the Registry category.
Safely cleans junk out of the Windows 2000/XP system registry. All changes made to the registry are fully restorable to it's original condition. You can make an exclusion list of registry entries that RegScrubXP will not display as problems.
MJ Registry Watcher is a simple registry, file, and directory hooker/poller designed to safeguard the most important startup files, registry keys and values, and other more exotic registry locations commonly attacked by trojans.
RegFromApp monitors the Registry changes made by the application that you selected, and creates a standard RegEdit registration file (.reg) that contains all the Registry changes made by the application.
Registry Finder is a freeware app the lets you browse through the local registry and create, delete, or rename keys/values modifying the values as its original data type (string, multi-string, DWORD) or as binary data.
Registry First Aid scans the registry for orphaned file/folder references, finds these files or folders on your drives that may have been moved from their initial locations, and then corrects your registry entries to match the located files or folders.
Regmon is a Registry monitoring utility that will show you which applications are accessing your Registry, which keys they are accessing, and the Registry data that they are reading and writing - all in real-time.
While you can always manually take full control of Windows registry keys, the process is a bit lengthy. RegOwnit is a standalone tool that lets you do so easily! It allows you to take ownership of a Registry key using Administrator, HomeUsers or the current Logged On User account.
Simnet Registry Defrag is a handy and reliable designed to allow you to defrag the system registry. By using Simnet Registry Defrag periodically, you improve your system's performance, prevent registry corruption, compact and optimize windows registry.
First and foremost Tweaking.com - Registry Compressor does NOT remove or add anything to the registry. What it does is it rebuilds the registry to new files, when this happens all the overhead is gone, and the registry is smaller and faster. From the author of Tweaking.Com - Windows Repair.
This will change the owner of the reg keys to Administrators and give admins & system full control. These utilities are part of Windows Repair and no longer updated. MajorGeeks recommends you download the complete Tweaking.Com Windows Repair instead.