LimeWire allows you to search for multiple files at the same time, available in several different languages, and is most famous for its ease-of-use and cross-platform compatibility. LimeWire will run on Windows, Macintosh, Linux, Solaris, and othes

Ease of use - just install, run, and search
Ability to search by artist, title, genre, or other metainformation
Elegant multiple search tabbed interface
"Swarm" downloads from multiple hosts

limewire keywords: peer to peer, p2p