Mighty Fax lets you send and receive faxes without a fax machine.

Fax directly from Microsoft Word, WordPerfect, scanner software, and any other Windows program. If you can print it, you can fax it with Mighty Fax. All you need to use our fax program is a telephone line and the modem you already have in your computer.

Setting up is easy, and in most cases you can simply run the installation program and immediately start creating, sending and receiving faxes from your pc.

MightyFax can also print incoming faxes as they are received, just like a fax machine. It works with all modems, and is compatible with calling cards and other special dialing requirements.

http://www.rkssoftware.com/mightyfax/overview.html