*(if emacs is your editor).
It’s fairly late at night, and I’m doing some desperately needed work coding. I’ve been using SVN to track my progress, as I do at work, and I’ve found myself using PSVN more and more. I’ve long had it installed, but never taken full advantage of it. It provides a central point within emacs to do just about anything you could want to do with an SVN-controlled directory, file or repo (or make new ones). It also hooks into ediff and various other bits of emacs magic. Rather than rehash things, here’s a link to an intro to it I found.
If you use emacs and SVN together even rarely, this is well worth a look.