Tools & utilities
There are a range of freely available tools and utilities which might help you with the management of your data.
Windows subversion client implemented as a Windows Explorer shell control. As such, it has all the usual features of a source code control system, as well as the ability to version folders, rename and delete files, etc.
Git: fast version control system
This is a free and open source distributed version control system, designed to handle everything from small to very large projects with speed and efficiency.
Truecrypt is well-regarded free encryption software that is available for all platforms.
