The question https://stackoverflow.com/questions/194812/list-of-freely-available-programming-books is currently closed as not constructive.
Though looking through the list of reasons
We expect answers to generally involve facts, references, or specific expertise; this question will likely solicit opinion, debate, arguments, polling, or extended discussion.
Alright well, the top answer now has a mega list that involves references.
Now, let's say we delete all the other answers, those that don't add value. What are we left with?
A useful link-filled canonical resource of free programming books
The post is a wiki. "this site is collaboratively edited, like Wikipedia" So we are in the business of making canonical information. Mission accomplished on this one.
No one else might immediately find the question useful or search for it, but the question once read actually educates people with something new and useful that they feel good about learning. It should inspire a greater reaction than a shrug.
So what say you, you anti-list-of-x users? If all the other answers are deleted, is it not useful, factual and a reference based resource that helps the Internet be better?