Cool Tools through Email

Possibly I am a little slow on the uptake but today I found this cool way to create a pdf. All you do is email the file you want made into a pdf and within a few seconds it comes back to you as a pdf.

Simple as that. I gave it a shot and was impressed.
Just email the document/file to:
pdf@koolwire.com and you will get a pdf back.

I liked this so much I did a search on Google to see what else I was missing and here are a few other email to addresses I find useful.

av@koolwire.com
Attach Wav and get a MP3. You can also email av@koolwire.com
mp3@koolwire.com and do the opposite. MP3 to wav.

pdf2txt@adobe.com
Send a PDF document to this email address as an attachment and it will come back as a plain text file.

e@xpenser.com
This is a simple way to track expenses in a spreadsheet through email. One way to use this address is to record your travel expenses while traveling.

What other email tools have you found?