Parcellite
Parcellite is a lightweight, tiny and free clipboard manager for Linux with a small memory footprint.Fork
Since development of Parcellite has slowed, a fork of it, ClipIt has appeared. Developed by Cristian Henzel, it fixes numerous bugs and offers a better user experience. Most importantly, it improves support for Unity AppIndicators, UTF-8, and adds support for GTK+ 3
