SOGo - SOGo is groupware server with a focus on scalability and open standards.
Midnight Commander - GNU Midnight Commander is a visual file manager, licensed under GNU General Public License and...
Baïkal - Cal and CardDAV server
Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.
Radicale - The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
Thunar - Thunar is a modern file manager for the Xfce Desktop Environment.