I'm trying to have a list of SDL Tridion Documentation References for easy usage.
Please list down all Tridion references based on Versions.
On top of what you have already answered yourself, only thing I could add is this site (tridion.stackexchange.com), and the following SDL Tridion related blogs:
There are plans to create a more structured overview of SDL Tridion related information (which would give you all these links in a single site basically), by replacing the SDL Tridion World website, but there is no ETA. for them currently.
I would also add Angel Puntero's Snipt blog to the other answers to this question. He has consolidated a large number of useful Tridion related code snippets from a variety of sources including StackOverflow and the blogs listed in Bart's answer.
Your question asks for documentation based on versions"
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