My top ten tools for learning

So over the last couple of months I've been watching a series of posts from different people in response to Jane's e-Learning Pick of the Day post on top ten tools for learning. It's been interesting, but mainly because they didn't seem like tools I'd use at all. For example: why is Firefox the top listed tool? It's a web browser? How does it help? Is it because of all the widgets and add ins? I don't know. So what I decided to do was write my list with explanations as to why. But let me explain this: I chose tools based on how they directly effected the LEARNING of my students (either directly or indirectly). With that said, here's my list (in order of usage and effect):