The Network-Oriented Document Abstraction Language (NODAL) is a set of standards and protocols for ubiquitous collaboration supported by an open source sample implementation.
Squall is a set of servers for the Peer Distributed Transfer Protocol (PDTP), a BitTorrent-like protocol with stricter server control and support for exporting large, dynamically changing hierarchical filesystems (i.e. more akin to HTTP/FTP).
mod_torrent is an Apache module that uses the BitTorrent protocol for content distribution and implements a basic BT tracker. With mod_torrent there is no need to generate separate torrent meta data files prior to content distribution on your web site.