True. Some of them even are free to individual developers. I've used a few different ones in the past. Right now we are using Vault(free for single users) which seems to be working ok with some of our workarounds...

Now that you've brought up the best of the ideas, I think I will post a link for Mohammed:

http://sourcegear.com/vault/pricing.html




>>We have all (an assumption, but a safe one I think) made this mistake in the past. Especially when very busy and meeting deadlines it is very easy to accidentally wipe out a file or delete the wrong directory or just overwrite a file we didn't wish to. It is a good practice to backup your directory to another directory before making any changes on a regular basis. Even better, back it up to another hard drive or external source. That way you will always have a working copy without your mods as well.
>
>Even better yet, to have source control procedures in place (VSS in another physical server, for example).