The Linux remote desktop server built on open source technology.

Cendio has a long history of working with the open source community, and participating in the VNC development has been a high priority for us.

Between 2002 and 2009, we worked with the TightVNC project. We contributed with patches to the TightVNC 1.2 series, which was based on the original VNC code base. In 2004, we started porting the "Tight" protocol to the fourth generation of VNC. The result was the TightVNC 1.5 series, which included an Xserver which could be used with Xorg 6.8. This was a huge improvement compared to the old releases, and allowed us to ship a server with features such as font anti-aliasing, OpenGL, and much more, making Xvnc suitable for modern desktop environments and applications.

Cendio is a leading developer of TigerVNC

The 1.5 series of TightVNC was never released. Instead, in 2009, we teamed up with Red Hat and the VirtualGL project. The result was the TigerVNC project. It was based on TightVNC 1.5. One of our first contributions was an integration of "SIMD" accelerated JPEG compression and decompression. Given a reasonable fast server, client, and network, this makes it possible to play back motion graphics in full screen mode remotely. This can be done without any client side video decoder software or specialized handling of video. These performance enhancements also made TigerVNC suitable for VirtualGL setups, which provides hardware accelerated OpenGL on the server side. This allows applications such as Google Earth to run with good performance. Other enhancements includes:

  • Development of the ExtendedDesktopSize extension, making it possible to implement the RandR extension on thep server
  • CMake based build system. Windows components can be built with MinGW
  • A new FLTK-based vncviewer which supports UNIX, Windows, and macOS

In addition to combining our efforts of creating a superior VNC implementation, we are also continously working on documenting the RFB protocol and its extensions.


TigerVNC is part of ThinLinc - the Linux Remote Desktop Server

ThinLinc is a stable and mature Linux Remote Desktop Server developed by Cendio since 2003. ThinLinc is based on open-source components, which are at the core of the product. Additionally, ThinLinc has proprietary parts which orchestrate the interaction between the components. As a consequence, ThinLinc brings the benefits of both worlds, combining reliable open-source components with full support and rigorously tested software. By doing so, ThinLinc allows IT administrators to take care of multiple users and devices in a centralized way, dramatically reducing downtime and maintenance costs.

Among the open-source components in ThinLinc, TigerVNC performs an essential role. In fact, one of the most important parts of the ThinLinc encrypted communication is the VNC traffic through the RFB protocol. In this case, it means that the remote desktop graphics and input from the keyboard or mouse in ThinLinc works through TigerVNC. Cendio invests money and time in maintaining the TigerVNC project through constant development and project care. This means that the company’s improvements in the TigerVNC project are not only incorporated into ThinLinc but also benefit all users in the TigerVNC open source community.


ThinLinc is available for free for up to 5 concurrent users. Try it now!