Here are a couple of useful tools for sending and receiving faxes from you computer at no charge:

• To Send: FaxZero
  Simply enter your name and email, the recipient's name and fax number, upload the document to fax, and send. There is no cost for this service, however there will be an ad on the cover page. The pages of your document will bear no extra marks.

• To Receive: JConnect Free
  Sign up for your own personal phone number you can use to receive voicemail and faxes as email attachments.