https://github.com/mailcheck/mailcheck --> Validate domain extension (@hotnail suggest @hotmail).

http://gionkunz.github.io/chartist-js/ --> cool design, responsive and cool browser compatibility. http://d3js.org/ --> examples and easy integration http://selection.datavisualization.ch/ --> Cool examples! http://paperjs.org/examples/division-raster/ --> examples and fancy use

https://design.google.com/tool/devices/ --> screen resolutions.

http://axis.netlify.com/#installation --> Steroids for stylus http://www.jqueryrain.com/?Fnkt7qge --> spinners http://tobiasahlin.com/blog/ --> Text effects

https://travis-ci.org/ --> freemium