Programs that require specialized hardware (ie: a modem with active line) are not likely to find any free place to host them. Unless you have hardware/pc yourself or have direct access to one through work or the like.
Modems are cheap though. You could look for an external one that say plugs into a USB. That way you don't have any messy hardware installs and could maybe even sneak it onto a work computer or something (although your IT staff will be angry, shhh).
If you have a laptop and an external modem, you could probably plug into any active analog land line (phone line) you can find and test it out.
great article.
im building an application that sends faxes, do u have an idea where can i host it?i dont have a connection through a modem so i need to try it and godaddy.com doesnt support this feature.any help is appreciated. thx