gtk-gnutella - gtk-gnutella is a server/client for Gnutella.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
BitTorrent - BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
WireShare - WireShare is a fork of the original LimeWire open source project.
LightShot - The fastest way to take a customizable screenshot.