If you're here, it means you want to learn more about the tools themselves. You want to understand why. What's going on inside of a particular tool? What decisions led to that design?
Don't see the topic you're looking for? Do you have specific questions that aren't answered here? Take a look at the Resources area. You'll find talks, podcasts, recorded streaming sessions, and other materials that may help you out. You'll also find links to the developer community where you can ask questions and get help.