faxjar - Send fax online. No registration required.
vFax - Get a virtual fax number for as low as $2.99 per month and 3.0 cents per minute
GotFreeFax - Send Free Fax Online to the U.S. and Canada.
eFax - Over 11 million people use eFax every day for their fax communications.
Hellofax - Easy. Reliable. Online faxing. Send & receive faxes from anywhere.
faxZero - Internet fax application.