From Quicknet Technologies:
iPrint2Fax enables anyone with a PC to send multiple or single faxes to fax machines or email addresses worldwide over the Internet. Using the Internet saves money - up to 95% monthly for volume users. iPrint2Fax installs as a printer driver so you can fax directly using your Internet connection from your favorite windows program to any fax machine worldwide or an email address. If you can print it, you can fax it with iPrint2Fax! iPrint2Fax is supported by MicroTelco services, Quicknet's reliable global Voice and Fax over IP service with multiple worldwide VoIP carriers. No equipment, phone line, or fax modem required. Multiple users can utilize a single account in a network. It works with any Internet connection, behind firewalls and proxy servers.
The latest version, v1.1 includes new features like automatic MicroTelco account number and PIN obtained for first time users after they sign up, new progress bar to report fax transmission progress plus improved clearer text displayed to track the fax progress.