This week's book giveaway is in the Reactive Progamming forum. We're giving away four copies of Reactive Streams in Java: Concurrency with RxJava, Reactor, and Akka Streams and have Adam Davis on-line! See this thread for details.
This thread is an attempt to build a list of good technical articles that focus on general programming concepts(not necessarily Java) that are absolutely necessary for any developer: ones that any one can refer any time. Please contribute as and when you have something to share.
I know this is not a discussion; so if this is creating a clutter please delete it.