Registry Booster

RegistryBooster is the easy answer to Windows registry problems. This award winning software will deep scan your registry to identify problems and errors that can cause instability and slowdown. RegistryBooster will then repair or remove harmful registry entries to optimize your PC for better performance. You can also defragment your registry for extra speed and efficiency.

Source from http://www.uniblue.com/software/registrybooster

Registry Mechanic

Powerfully simple tools to clean up your PC and secure your personal privacy.

Source from http://www.pctools.com/registry-mechanic

Registry First Aid

Registry First Aid scans the registry for orphan file/folder references, invalid font references, obsolete Start Menu items, invalid fonts, shared DLLs, application paths and more...

Source from http://www.registry-first-aid.com

Wise Registry Cleaner

Wise Registry Cleaner are experted atspeeding your PC by repairing registry errors and defragmenting the Registry. It can scan the Registry, mark the orphaned or bad registry entries, and show the name and value of each registry to you. It can distinguish the registry entries dangerous to delete from the ones safe to delete. So it can give some suggestions to you to decide which to delete and which to keep.

Source from http://www.wisecleaner.com/wiseregistrycleanerfree.html

Auslogics Registry Cleaner

Auslogics is proud to offer one of the most stable and reliable registry cleaners available on the market. It will repair all errors in your Windows registry and clean it up from obsolete entries. With Auslogics Registry Cleaner you can avoid system crashes and make your Windows running more stably.

Source from http://www.auslogics.com/en/software/registry-cleaner

Glarysoft Registry Repair

Registry Repair is one of the safest Registry cleaning tools available in the market today. Its scanning engine is fast,thorough and safe.

Source from http://www.glarysoft.com/products/utilities/registry-repair