If you use the collaborative features of SubEthaEdit a lot, especially in your classes, you will often experience unpleasant moments when creative students just do a “Select All” and “Delete”.
SubEthaEdit Archiver will allow you to track one SubEthaEdit document. Timed snapshots of the document are saved into a folder where you can retrieve previous saves.
So when a student decides to wipe-out your document, you can coolly close the document, find a version just before it was wiped, and re-announce it again.
SubEthaEdit Archiver is provided free (forever) and does not come with support of any kind. Unless you are an educator, when bug reports and feedback is welcome!