vpnDialer is a gtk2+ gui for the vpnc package. It's a simple and easy to use program to create and disable connections. It can also be used to create and modify vpn configuration profiles.
PyVpn is a software for management VPN connections for GNU/Linux written in Python using pySqlite and pyGtk. With DB support and Wi-Fi support too. It is based on the "iwconfig" utilities and the "ppp" package.