Don’t have a fax machine? There are several free and low cost services online you can use to send or receive faxes. All you need is a computer, an email account, and your document in PDF or Word Doc format.
Send up to 3 pages for free (an ad will be included on the cover page). For only $1.99 per fax you can send up to 15 pages with no ads. You cannot receive faxes through FaxZero, only send them.
Get a free Seattle-based phone number to receive faxes; the documents are delivered straight to your email account. You cannot send faxes with K7, only receive them.
MyFax and eFax
Both services give you a local or toll-free fax number with which you can send and receive faxes. They have a range of plans for only $10-40 per month.
If you’d like to read more, Lifehacker has a great round-up and comparison of these services on their website.