Where can I find examples of good code for microcontrollers and FPGAs?

Question

Microcontrollers

Hello coders and hardware guys!
Who knows any suitable open source projects with microcontrollers, FPGAs and other game? Such that everything was beautiful, correct and pleasant to look at. At a new job, you will have to code a lot, and for the last 5 years I have been mostly involved in circuitry. We need to remember all this dead beef and take inspiration from somewhere so that it doesn’t come out through the ass.
For microcontrollers, I'm interested in C and C ++, in terms of VHDL.

Answer 1

According to requests - on opencores and on github, for C and C ++ - on github.

Answer 2

https://github.com/andysworkshop/stm32plus