Avogadro libraries provide 3D rendering, visualization, and analysis
CGRU: Afanasy render farm manager and RULES project tracker.
itom - an Open Source Measurement, Automation and Evaluation Software
Scanning Probe Microscopy Controller and Data Visualization Software
This program allows you to view BPG Images in Windows,Linux and macOS.
Maxwell Render for Blender
Bruno's RAY Tracing Engine