Embedded designs using displays within Windows or Mac OSX
DisplayLink already have drivers for major Windows and Mac releases, supporting up to 6 extended displays (4 displays on Mac). This software is already available for download. These drivers can be used on any computer today if you need to use extended displays on mainstream OSes.
The USB driver in DisplayLink software on some OSes is based on LibUSB and the source code for this is available.
DisplayLink Open Source Code
For USB 2 devices (DL-1x5 family) DisplayLink has a open source driver available, called LibDLO. This is owned by the open source community and more information is available at freedesktop.org.
For USB 3 devices, DisplayLink provides an open-source kernel mode driver (EVDI) with an accompanying library (libevdi), and a supporting binary application compatible with Intel x86 or x64 platforms. Source code for the open-source components can be found at DisplayLink's GitHub. Further information about using the open source driver on different Linux distributions can be found in this article.