Dittorrent is a peer-to-peer dialup system for accelerated “Internet access” in the developing world. Dittorrent provides a mechanism for multiplexing the scarce and expensive international Internet bandwidth over higher bandwidth p2p dialup connections within a developing country. Our system combines a number of architectural components, such as incentive-driven p2p data transfer, intelligent connection interleaving and content-prefetching. Dittorrent's incentive-driven dialup p2p data transfer architecture is inspired by Bittorrent". For more information read the following paper: Saif, U., Latif, A., Butt, S. F., and Butt, N. F., Poor Man's Broadband: Peer-to-Peer Dialup Networking, In ACM SIGCOMM CCR Journal, vol. 37, no. 5, October 2007.

Source code can be downloaded from CVS of this project...
which is at CVS

It can also be downloaded from Download Page

There are three modules

1) dittorrent-daemon
2) dittorrent-plugin
3) dittorrent-tracker