A little off-topic, but I would have loved to see mifos / fineract[0] referenced in the article. Great open source banking core having many of the strengths listed
The MIT's missing semester class (https://missing.csail.mit.edu). For me, it has filled many gaps in my self-teaching journey. I don't have a CS degree.
I built the brachiograph a few years ago. I wanted to show my kids (8 years old and 6 years old) cool things the could build by plugging a raspberry, some servos and readily available materials. We were impressed on how good we could reproduce one of those shopping mall cartoons of my daughter. It was a fun build.