How does knowledge sharing take place inside your software development team?
What techniques do you use? XP best practices like pair programming or more advanced approaches like mob programming or simply no collaboration?
But seriously, as a freelancer, I'll usually explain some new process or algorithm to my non-technical wife until it makes sense to her. It's a better version of rubber-ducking that helps you not only understand your own code, but also improves your ability to talk to clients.
Not quite what you were asking, but I think it's relevant. You can't really share the nitty-gritty of technical info with colleagues until you can also give an overview to a layperson.
many work cultures are tribal, insular, and/or fueled by fear. knowledge sharing is the exception in such environments.
i think basic tools like a source code respository and a wiki (especially one that allows grouping/arranging pages together into folders or some hierarchy) can go a long way.