IfcOpenShell is a software library that helps users and software developers to work with the IFC (Industry Foundation Classes) file format. The IFC file format can be used to describe building and construction data. The format is commonly used for building information modelling. IfcOpenShell uses Open CASCADE to convert the implicit geometry in IFC files into explicit geometry. At the time of writing, IfcOpenShell provides an importer for Autodesk 3ds Max, an importer for Blender, and a stand-alone application to convert an IFC file into a Wavefront .obj file. Furthermore, software developers are explicitly encouraged to use the IfcOpenShell library in their own applications.
Topologic is a simple renderer for certain higher-dimensional geometric primitives and some regular 3D shapes. The idea is to make it easy for students of certain higher-dimensional maths and physics topics to visualize the typical primitives in those fields and get a grasp for the topic. Note: the program as such is freeware, while the part of it that deals with the Mathematics to project the geometric shapes to 3-space and 2-space has been released separately under an MIT/X style license.