ADSL with PPTP makes ADSL easy; you just have to install it, edit one config file, and start it. It also takes care of reconnecting in case of a disconnect. It is mainly for use in Austria.
Linux Bridge Utilities is a set of tools for IEEE 802.1d
ethernet bridging (plus Spanning Tree protocol) for the Linux
A tool for securing DNS communications between a client and a DNS resolver.
A polyhedral extraction tool (PET).