I've taken the decision to make Ropossum, my authoring tool for generating content for physics-based game, open-sourced! It's the version of late 2012-early 2013, not my latest work. But it's a great version nonetheless! You can get the physics-engine, CRUST, now on github.
Context
This is an archival short-form note. This summary is added to make the main idea explicit for search engines and answer engines. It clarifies what this note is about, why it was shared, and what the reader should take away from it.