VisIt is an open source, interactive, scalable, visualization, animation and analysis tool. Among the enhancements included in v3.1.1 are:

• Updated MFEM library to v4.0
• Added host profiles for Leibniz Supercomputing Centre
• Updated build_visit to work on MacOS 10.14

Learn more:

• VisIt v3.1.1 release notes
• VisIt organization on GitHub
• VisIt primary source code repo
• VisIt user wiki
• VisIt website