Hey! This is the old a broken mold. Newer stuff is at abrokenmold.net.
That being said, feel free to rummage through the archives over here. Also feel free to leave comments; we're still keeping an eye on this.

Unlocker (Windows) - Ever have a flash drive or such that Windows just doesn't want to Safely Remove? Fire up this baby and see what's holding on to it. I think if it's explorer.exe, it should be safe to Unlock it or just yank out the drive, as long as you know you aren't transferring data to  or from it, or moving files around on it. Otherwise, assuming you aren't doing data work like I just mentioned see what else is tying up your device (backup managers, mp3 player managers, and so on…). Can also help you out the same way if you have a file you want to work with, but you get a message something else is using it. I'm not sure, but I think it might even help you get past an Access Denied (you'd probably have to be an administrator). Brilliant little tool.

ExifTool (Windows/Mac/Linux under Perl) - this one is a command line tool for dealing with metadata. I found this tool in a search for something to edit the date taken on digital photos, because sometimes one forgets to reset their camera clock. *Ahem* Certainly not me. Never. Anyway, to fix my mistake, I mean such a mistake, this will do the trick (though I haven't actually put it to use yet). Now, I know all you out there are shivering in fear of using a command line tool on your beautiful photos. Well, make backups of them before you start anyway, but there are some GUI's to make things so much safer and more comfortable. 
ExifToolGUI - Windows (tested on XP SP2). Lot's of nice GUI options for accessing the awesome power of ExifTool. You'll need to download ExifTool separately.
Mac users, you can check out the "Related Utilities" section on the ExifTool homepage.
Linux users, stop being a weenie and use the command line. Heh.

PDFCreator (Windows) - It installs as a printer on your system and allows you to make PDF files from any app that can print to it. Pretty nifty. Now I can make PDF's from WordPerfect 8 (yep, that's what I use, for real).

Hope this brightens your day at least a little bit.