Some very nice ones in here: AVL and Red/Black trees, especially the rotation step. I also liked it when the code shows up on the upper left and you can see it

Some very nice ones in here: AVL and Red/Black trees, especially the rotation step. I also liked it when the code shows up on the upper left and you can see it stepping through line-by-line, such as the Fibonacci example. The radix tree didn't seem to work for me.