Libraries and interactive sandbox html page.
Can programmatically set up a particle system for use in other projects. The sandbox page is mostly for the whiz-bang factor and to show off capabilities without any user investment.
To run the sandbox page on your local machine, it needs to run on a web server.
The sandbox html page is dependent on the LessCSS javascript library which does its own magic to generate the CSS. Due to most browser's security models a page can't make ajax requests against a file system so you need to be running over http.