The utility that I’ve needed for years and finally looked for: PureText.
So many times I copy text from a web page or other document and need to paste it into an application that doesn’t offer the “Paste Special” option. I just want the text, not the formatting.
PureText lets you create a shortcut key (Windows-V by default) that will paste just the plain text from the clipboard.
Update (12/4/2012):
Now that I’m using a Mac most of the time, I use “Plain Clip” every day. I just copy some text, click once on the Applications stack in the dock, then type “plai” and hit enter to clear the formatting out of the clipboard. I’m sure there’s a quicker way, but that’s my habit now.