| [pixman](http://www.pixman.org/) | Pixman is a low-level software library for pixel manipulation, providing features such as image compositing and trapezoid rasterization. Important users of pixman are the cairo graphics library and the X server. |
| [PyQt](http://www.riverbankcomputing.co.uk/software/pyqt) | PyQt is a set of Python v2 and v3 bindings for Digia's Qt application framework. |
| scikit-image | |
| [SUMO](http://www.sumo.dlr.de/wiki/Main_Page) | Simulation of Urban MObility (SUMO) is an open source, highly portable, microscopic and continuous road traffic simulation package designed to handle large road networks. |
| [Tk](http://www.tcl.tk/) | Tk is an open source, cross-platform widget toolchain that provides a library of basic elements for building a graphical user interface (GUI) in many different programming languages. |
| [VisIt](https://wci.llnl.gov/simulation/computer-codes/visit) | VisIt is an Open Source, interactive, scalable, visualization, animation and analysis tool |
