RegCompact.NET 

Effectively reduces the time to access the registry on Windows 2003, XP, 2000 and NT 4 by optimizing the data within the system's registry hives.
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Registry Analyst 

Does your computer's work is slow? Does your system crashes often? The Registry Analyst introduces a solution to this problems. It analyzes the system registry, finds invalid entries and fixes them.
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NTSet 

A Delphi/C++ component pack to easily acess Windows API: Windows services, event logging, user privileges and credentials, shared devices, file access rights, registry security, remote administration, scheduling and messaging, network browsing etc.
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Registry Pro 

Registry Pro is an activeX control that gives activex and COM (dll) developers easy access to the power of windows registry programming.
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SCIROCCO RegEdit Control 

Make modifications to the Windows Registry Easy with this control. Just drop it on your form then use three Methods RegistryGet, RegistrySet and RegistryDelete to modify the Registry! Suitable for Visual Basic, Visual C++, Visual Foxpro etc.
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ADEX Registry 

ADEX Registry is a COM component for VB / ASP
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