Top 100 Tools for Learning

Here is a list of the top 100 tools for learning that I would like to investigate further, I think. A lot of them I already use without even thinking about it (like #1, 2, 4, 8, 9 (obviously), 13). Others don't make sense to me as a tool for learning. Skype as #3? I mean, it's a communication tool so I guess that helps learning in that it allows one to communicate with others and then learn but to me, that's kind of a stretch.