Bought a New 2DS XL for my oldest son when he turned 9. Bought a second one for myself not long after. They were cheap secondhand, so it was a quick decision. I love the games and I used to play on my commute. Now it is mostly played on by my youngest. We’ve got a shit load of games, most also bought secondhand. And they still play on them anytime we go for a long drive! It is definitely the best system I’ve owned. Massive bang for buck.
According to the LibreCAD website, it is open source.
https://github.com/LibreCAD/LibreCAD