1)   MultiMon 2.00
MultiMon is an advanced multifunctional system monitoring tool for Windows which displays highly detailed output of a very wide range of activities in real-time. It is an indispensable tool for system administrators,developers and support engineers.

 2)   RegWorks 1.3.2
RegWorks is a comprehensive registry management software solution that includes registry viewer, editor, access monitor and tweaker features.

 3)   RegSpy 1.72
RegSpy is a windows registry utility that spies changes made by specified program. RegSpy will help you to track all little changes in your system registry made by other programs. With RegSpy, you can: Quick make Snapshot and Rollback of registry