FaxZero is a simple and effective fax service that lets you fax PDF files, Word Documents or Excel spreadsheets to any fax machine for free. Though the receipient must be located either in the United States or Canada, the sender can be anywhere as long as he has access to internet [fax machine not required]
Fax Zero is supported by advertisements that will be displayed on the cover pages of the free faxes you send. [see screenshot of a sample fax page delivered by faxzero]
If you are looking to send a business fax, there's a ad-free version that costs ~$2 for upto 15 pages. [payment via PayPal]
The status of your fax message will sent in an email after the delivery.
FaxZero.com [Free Internet Faxing via LifeClever]