| [Mesa](http://www.mesa3d.org/) | Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics. |
| [motif](http://motif.ics.com/) | Motif refers to both a graphical user interface (GUI) specification and the widget toolkit for building applications that follow that specification under the X Window System on Unix and other POSIX-compliant systems. It was the standard toolkit for the Common Desktop Environment and thus for Unix. |
| [OpenCV](http://opencv.org/) | OpenCV (Open Source Computer Vision Library) is an open source computer vision and machine learning software library. OpenCV was built to provide a common infrastructure for computer vision applications and to accelerate the use of machine perception in the commercial products. |
| opencv-python | |
| [OpenDX](http://www.opendx.org) | Open source visualization software package based on IBM's Visualization Data Explorer. |
| OSPRay | |
| [p4vasp](http://www.p4vasp.at) | p4vasp is a visualization suite for the Vienna Ab-initio Simulation Package (VASP). It contains an extensible GUI framework, that can be used to view material structure, density of states, band-structure and more. |