Eddie acts as a high availability WAN and LAN clustering tool for web servers (including Apache). It provides load balancing at two levels (DNS and LAN), failover redundancy, and admission control to maintain quality of service levels.
p2p-fs is a Peer to Peer file system in user space, using FUSE. Allows you to share files over an LAN and/or WAN. Can be mounted as a normal file system under Linux.