This came up on HN a couple of months back - http://www.algomation.com/
A few sorting algorithms - http://corte.si/posts/code/visualisingsorting/index.html
Visualization of Path-Finding Algorithms - http://qiao.github.io/PathFinding.js/visual/
Lastly, Mike Bostock (creator of D3) has a really cool bunch of algorithms over at his blog - http://bost.ocks.org/mike/
I also use http://www.cs.usfca.edu/~galles/visualization/Algorithms.htm... when I want to visualize algorithms.
Try it out, it's great for learning/reviewing algorithms!
The interface feels a bit too busy and it is not clear on what to click on the details screen. Buttons at the bottom? Arrows on the right? Menu on the left? I was confused there for a while.
This came up on HN a couple of months back - http://www.algomation.com/
A few sorting algorithms - http://corte.si/posts/code/visualisingsorting/index.html
Visualization of Path-Finding Algorithms - http://qiao.github.io/PathFinding.js/visual/
Lastly, Mike Bostock (creator of D3) has a really cool bunch of algorithms over at his blog - http://bost.ocks.org/mike/