PiShare
RetroShare binaries compiled for Raspberry Pi
compiled RetroShare binaries, and packaged for Raspberry Pi using Debian 7.0 Wheezy ARMHF known Raspbian
If you want to compile it yourself, download the source-tarball, it is only ~7MB big, or pull the code repository with SubVersioN.
compiling takes up to 2-3 hours.
or
install the .deb files with dpkg -i "retrosharefilename".deb
if necessary make a "apt-get update && apt-get upgrade" to update your system for all
how to start it in a detached screen session:
screen...