gpppwrap is a graphical user interface to conveniently select a phone number and dial into your ISP. It's very convenient if you use different ISPs, and is based on the GTK GUI libraries. It is only a wrapper around the ppp-on/ppp-off scripts and gives you therefore still the power and flexibility of these scripts. It is written for people who like the power and flexibility of shell and Perl scripts, and also want an idiot-proof way to connect to the Internet.
