BongoSurfer is a least-cost router for Linux, like the Smartsurfer program for Windows. It allows you to connect to the Internet with a 56k modem or ISDN, and chooses the cheapest provider for you. The tariff database is updated every day from http://www.billiger-surfen.de/. Since the tariffs only apply within Germany, the program is of little use in other countries. It features a cost calculator, a traffic monitor, an online timer, and more.