TPC Fax is a free service that lets you send text faxes by email. It doesn’t have a huge international coverage, but it works for most big cities.To send a fax, you need to drop a mail to:
where recipient_name is the name of the person or institution you’re sending the fax (use _ instead of space).
Really you could do this with any email. The TCP Fax service is doing the work not Gmail, but its still good to know.