HelloFax is a web service (that also has a Chrome extension) that allows you to send faxes and sign documents, all online. No need to print, sign, scan and then send. No need to keep a fax machine (and the phone line) anymore either.
It integrates with Google Drive, making it easy to keep track of your documents. You can easily send and receive faxes just by entering the fax number. A fax sent to you gets forwarded to your email as a PDF file. You can also use it to sign and fill out forms. Upload a document, fill it out, and then send it via fax or email.
HelloFax creates it's own folder in your Google Drive account to make it easy to find all of your sent and received faxes and signed documents.
The free plan offers 5 free pages faxes, unlimited signed emails, and 5 signature requests. If you need more, there are different plans available.
This is another great resource to go paperless and save money.
Google Drive - online document storage and access to Google Docs
Tips, tools and resources to go Paperless
FaxZero - free internet faxing