FaxSalad - Pay-as-you-go, secure faxing.
Bitcoin Fax - Bitcoin Fax allows you to send a fax with minimal fuss. No sign up required. How it works:
Friends of Thrones - Extension that changes GoT spoilers into a Friends scene
iFax - IFax is one of the most popular software apps in its category. The app allows you to send a fax directly from your PC, tablet or phone. The software is available for the Windows, Mac, iPhone and iPad platforms... read more.
FAXY - Pay-as-you-go virtual fax
GotFreeFax - Send Free Fax Online to the U.S. and Canada.