Linux makes a great platform for deploying diskless workstations that boot from a network server. The LTSP is all about running thin client computers in a GNU/Linux environment. Recycle old Pentium Is as thin clients.
The WWWOFFLE Homepage
The wwwoffled program is a simple proxy server with special features for use with dial-up internet links. This means that it is possible to browse web pages and read them without having to remain connected.
UUCP - Unix to Unix CoPy
The UUCP Project started in the early 1980s as a means to facilitate the exchange of electronic mail among sites using the UUCP store-and-forward transport mechanism. This UUCP software, originally part of the UNIX operating system became available on a variety of operating systems and platforms, from large mainframe to small home PC's.