Hello Hugi,
all the documentation should be in the Documentation category, but some of it has not been written yet. Specifically we have only this:
Open Ethnographer is based on Annotator.js and written in Ruby on Rails, and integrated with the Discourse backend and frontend. It also lives in the same codebase.
For the other tools, you can find bits and pieces in this category:
https://edgeryders.eu/c/workspaces/ssna
But there are no full manuals that I know of. Edgesense is written in Python. Both Edgesense and GraphRyder are stand-alone tools that are meant to get their data from Discourse via a JSON API. Discourse offers API access to all its data out-of-the-box (as it is the native interface between the JavaScript application in the browser and the Discourse server).
To find out more about these tools, you have to talk to Alberto and people Alberto points you to. Once you find it out, please document it in manuals for these tools in the Documentation category.