Yahoo's Best Product
Yahoo has become the joke of Silicon Valley. But while they may have let their lead in search die of neglect, they should be applauded for one of their greatest contributions it JavaScript. The YUI libraries are great. I learned JavaScript while hacking around with YUI stuff. It made me feel like I could actually hack something together that worked and looked professional. YUI 3 is even better. Take a look this Nettus tutorial for making a Twitter widget.