The Pharo edition of ActivePapers focuses on exploring the documentation and user interface aspects of computational science. It is based on the Glamorous Toolkit, an innovative development environment for Pharo based on the concept of moldable development (see this blog post for an introduction and further references).
The Pharo edition is work in progress. Anything can change at any time. Even GToolkit is still labelled as alpha software. Don’t build anything important on top of this code.
After that warning, feel free to explore the code on GitHub.