Here is something really cool we’re currently working on: mixed content editing in mbeddr. What does mixed content mean? It means that you can mix prose (i.e. free text, with text-editing-feel) and actual MPS program nodes (with code completion, referencing, refactoring). As a proof of concept, we have built a really nice documentation language that can deal with images, visualization, code references and embedded code snippets — generating to HTML and Latex. We also show how to integrate expressions with prose text.
The whole thing is based on Sascha Lisson’s Richtext editing facility (https://github.com/slisson/mps-richtext/). While this stuff is not yet quite finished and not yet on the master branch, it’s extremely cool and definitely worth showing now 🙂