Clipboard

ClipIt – free and open source, lightweight clipboard manager on GTK+

Clipman – free and open source clipboard manager developed for Xfce graphics environment

CopyQ – free and open source, multi-platform clipboard manager with advanced features

Diodon – free and open source, simple and best integrated clipboard manager for the Gnome/Unity desktop

Klipper – free and open source, multifunctional clipboard manager for the KDE interface