TTK
https://topology-tool-kit.github.io/
 : Topology ToolKit

Team : APR

The Topology ToolKit (TTK) is an open-source library and software collection for topological data analysis and visualization. TTK can handle scalar data defined either on regular grids or triangulations, in 2D, 3D, or more. It provides a substantial collection of generic, efficient and robust implementations of key algorithms in topological data analysis.

Software leader : Julien Tierny
https://topology-tool-kit.github.io/