Signature for Mobile App

http://keith-wood.name/signature.html
http://www.tricedesigns.com/2011/12/21/capturing-user-signatures-in-mobile-applications/#html5
http://www.unbolt.net/jSignature/
http://stackoverflow.com/questions/20280154/signature-draw-for-phonegap
https://bitbucket.org/codeyellow/cordova-plugin-signature-view