Remmina

Remmina is a free and open-source remote desktop client designed for POSIX-based operating systems, notably Linux. It provides a graphical interface written in GTK+ that allows users to connect to remote machines using a variety of protocols, including RDP, VNC, SSH, NX, SPICE, and XDMCP. The application emphasizes a unified, tabbed interface that can manage multiple connections and sessions simultaneously. Remmina supports full-screen mode, keyboard mappings, and per-connection settings such as resolution, color depth, and security options. It can use SSH tunnels for secure connections and integrates with GNOME and other desktops as a native-type application.

Remmina stores connection profiles locally on the user's system, typically in a dedicated directory, enabling easy backup or sharing of configurations. It is distributed as free and open-source software under the GNU General Public License, with packages available in most major Linux distributions and other UNIX-like systems. The project maintains a modular architecture via plugins, allowing additional protocols to be added by third-party developers. Remmina is widely used in enterprise and educational environments, particularly where administrators need a single tool to manage remote access to heterogeneous systems.