You can look at:

- https://github.com/aosabook/

- https://github.com/mspnp/

- https://martinfowler.com/

Regarding distributed architecture:

- http://highscalability.com/

- https://github.com/theanalyst/awesome-distributed-systems

- https://github.com/binhnguyennus/awesome-scalability

Also https://github.com ;)