If you truly want version control, which you seem to, since you mention git, and you want it to be usable by not too tech-savvy people, then I can heartily recommend PlasticSCM.
I have been using it for a few years now for my own private code, in numerous languages. I am particularly impressed by its diff/merge capabilities and also by some of the graphical eye candy (not to mention the free T-shirt for completing a survey ,-)
Best of all for you, it integrates into MS office, adding new buttons to the toolbar, and it has strong MS Office (word and Excel) diff & merge capabilities.
We’ve just released new changes in Plastic SCM integration with
several Microsoft Office tools: Word, Excel and PowerPoint.You’ll now be able to diff Word docs, Excel sheets and even PowerPoint
presos (restricted to old versions which had support for it).Now you’ll be able to merge Microsoft Word files too… out of the
box! What the new changes are about When several people are updating
and making copies of the same files, multiple versions easily blossom
out of control.Plastic SCM can now compare proprietary file formats including
Microsoft Office files.We released integration with Office in Windows to perform diff and
merge for Office documents.As stated above, now you can use Plastic SCM (default installation) to
Microsoft Word document merge.The new release is also adding diffing capabilities for:
Excel - Microsoft Excel 2003 and later Word - Microsoft Word 2003 and later Power Point - Microsoft Power Point 2003 (Microsoft dropped support for diffing after the 2003 release)
