Website: Send Faxes to US and Canada for FREE

Using Fax Zero, you can send a fax to the US or Canada via your internet connection for FREE. There are some limitations: Ad on the cover page, max. 2 faxes per day, max. 3 pages per fax. Limited to Doc and PDF files (though you can also send Text files).

This is a great service for those times when you need to send a fax on the fly.