TimeDrawer

"TimeDrawer" is an automatic file versioning system. Everytime you save a file, TimeDrawer detects it and keep another copy of it. You can compare your current writing job with its past versions to see how you have modified your document. TimeDrawer backs up your intellectual writing job.

Unlike Time Machine in Mac OS X Leopard, TimeDrawer won't wait to backup your files. TimeDrawer immediately save backup when it detects file modifications.

Customizable setting
You can select files to backup by location, file types, file size, etc.
You can save backup database onto your local hard drive as well as external drive.
You can restrict the database size not to surpress local hard drive.

Compare Graphically
Compare your current document with its 5 minutes ago version. Red, blue and green markers show where sentences have been changed.
*To store text content, the file needs to Spotlight

Flow View
Enjoy CoverFlow like icon flowing view.