Faxaway.com gives you a dedicated fax number to receive faxes. When people send a fax, you receive it by email a few minutes later. No software to download. Not free, but only $1 per month for unlimited inbound faxes.
Faxaway doesn’t have an impressive website. They don’t have many bells or whistles. They do have a long history of reliable service. You can also send faxes from your email using Faxaway (fees apply). Just compose an email to firstname.lastname@example.org (eg. email@example.com).
Tip: Fax yourself documents using your Faxaway number to scan them to your computer.
Need more options?
Use previously mentioned MyFax.com: I setup a Faxaway account for myself for private faxes. However, for business, I use MyFax.com. It boasts more options such as a great web portal to manage your account and view fax history. Service starts a $10 per month so it isn’t cost effective for only a few faxes.