Bitcoin Fax - Bitcoin Fax allows you to send a fax with minimal fuss. No sign up required. How it works:
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
faxZero - Internet fax application.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
Tiny Fax - The Township of Tiny is an environmentally focused, diverse family of communities providing a healthy lifestyle. (Account not monitored 24/7)
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs