I am still interested and even found some new things. I completely agree with reading the source code to be the best way to learn.
Here are some other resources I'd consider worth mentioning over here also for anyone reading this in the future:
- a book by Adam Tornhill on C patterns leanpub
- Github repo with pattern implementation Github
- Tsoding Daily Youtube
- Magicalbat Youtube
- https://stackoverflow.com/questions/4112796/are-there-any-design-patterns-in-c
- Eskill Steenberg Youtube
edit: fixed the links