I am a C++ developer, but I want to learn and improve writing code that is clean and pleasure to read (for others). What open source project written in C++ would you recommend from which I can learn?
The SFML game engine is very well written and documented, definitely a pleasure to read. https://github.com/SFML/SFML
I recommend taking a look at this: https://github.com/fffaraz/awesome-cpp
It's a very well curated list containing both older and more recent projects realized in C++, neatly separated into categories.
Which of these projects have code that is easy and pleasurable to read?
I like this:
It is a great example of academic code which is used in research but is also pedagogical. If all C++ was like that I don't think anybody would have a problem with C++!