AJC Active Backup 1.3.5     
Automatically backup files as soon as they change and keep multiple revisions

AJC Diff 1.9.0     
Compare file diff. Combined or side by side. Full, context or differences only.

AJC Directory Synchronizer 2.7.1     
Synchronize files and compare folders between any two locations

AJC Grep 1.3     
Windows Grep, Find & Replace with data extraction