Zamzar
This looks like a pretty cool service: Zamzar, free online file conversion. You upload your document in one format, and they will convert to another: Excel spreadsheets to PDF, WAV to mp3. Granted, most of the conversions are from/to formats already supported by most software I already have, but there are some edge cases that I would never be able to handle, like Microsoft Publisher to HTML, WordPerfect to Word, PowerPoint to Flash, etc.
Bookmarked!
Via Cool Tools.
