From iA wiki
giFT is a file sharing daemon that runs in the background and connects your system to multiple sharing networks. A lightweight protocol is used by clients to communicate with the giFT process, allowing the protocol code to be completely abstracted from the user interface.
Connects to the following networks:
About the acronym: giFT used to mean 'generic interface to FastTrack' or 'giFT isn't FastTrack', and then later was renamed to GNU Internet File Transfer and then to its current incarnation.