The library jsPlumb seems a nice library to do some block diagram visualizations in the browser. I use it as an opportunity to understand AngularJS. How do they both actually manipulate the DOM and how can I mix AngularJS with jQuery (for jsPlumb).
The two folders:
In the scripts directory there is a run.sh script, but seriously, you won't need it. It's a matter of opening the index.html file in the jquery/ or angular/ folder in your favorite browser.
In other words, feel free to use in whatever way!