Ronin in particular is the most fascinating piece of this network to me. I was hooked by the (broken) version 1.0 when I first found it a couple years ago and played around a bit with fixing it. It played well with a few other key influences in my life and I've been playing around with similar--albeit prototype--systems ever since.
To name one stand out feature. I have been playing around with generative design/creative coding/coding art for a while now and I seem to be on an edge of the domain. My work lately has been increasingly taking a set of starter points, so to speak. I have shapes or layouts in my head that I want to run through the generative process, but I am distinctly starting with these hard coded values.
Ronin provides direct manipulation on the canvas with `$` prefixes in the code. If you type `$point`, then click on the canvas, "$point" is replaced with code representing that point. The simplicity of this interface for writing code that heavily involves numbers in context (ie on their domain) is an inspiration. There are probably a couple of names for this connectivity, but one might be bi-directional evaluation. Manipulations in code yield the canvas, and manipulations on the canvas yield code.
There's a lot going on here, xxiivv.com
And some fun to be learned by poking through git commits. If you know Orca, (was popular here a while back) it didn't start as a music generation system.
Edit:
Ronin tutorial video, 5:22. First 30s tease the original version I saw. https://www.youtube.com/watch?v=SgAWGh1s9zg
Old version tutorial/demo 4:09 : https://www.youtube.com/watch?v=gifzjhyBwOc