vncssld is a VNC SSL repeater for Unix. You can use it to access your user's desktop using VNC SSL. The advantage of using a repeater is that you don't need to configure your firewall to be able to connect to your user's desktop: both VNC server and VNC client connect to the repeater. Since it is using SSL, It can even work using a standard HTTP/HTTPS proxy (like squid or DansGuardian).
MCM is a set of tools that ease the management of multiple servers. It's aimed at network or system administrators who need to connect to different servers by different means every day. It can be used via an ncurses interface without requiring an X server, and via a GNOME-based GUI.
Guacamole is an HTML5 Web application that provides access to desktop environments using remote desktop protocols such as VNC or RDP. A centralized server acts as a tunnel and proxy, allowing access to multiple desktops through a Web browser. No plugins are needed. The client requires nothing more than a Web browser supporting HTML5 and AJAX.
Window Switch is a tool that allows you to move applications between networked computers. The windows appear where you need them, as they were. You no longer need to save and send documents to move them around; simply move the view of the application to the machine where you need it.
noVNC is a VNC client implemented using HTML5 technologies, specifically Canvas and WebSockets. It supports "wss://" encryption (SSL/TLS). For browsers that do not have native WebSockets support, the project includes web-socket-js, a WebSockets emulator using Adobe Flash. In addition, as3crypto has been added to web-socket-js to implement WebSocket SSL/TLS encryption, i.e. the "wss://" URI scheme.
RD Connection Manager is a comprehensive remote connection management and publishing solution. It supports the world’s most popular remote desktop management protocols and provides comprehensive functionality to help users and system administrators organize their remote connections in various environments within any organization. Administration is simple with the ability to manage accounts, groups, and permissions. Sensitive data, such as user account settings, are encrypted with SSL. Strong connection security is supported. A single sign on system allows a user to establish multiple remote connections instantly after logging in. Supported protocols include RDP v.5, RDP v.6, VNC, and Citrix ICA.
ThinVNC exploits HTML5 canvas to display a remote PC desktop without requiring any additional plugin, add-on, or installation of any kind on the client side. Regardless of the computer or mobile operating system, ThinVNC provides native, secure data transmission using HTTP and SSL. It includes a Presentation Manager and can be set up as a gateway to proxy other ThinVNC instances.