JavaScript:
jquery.js – http://jquery.com/
jquery.easing.1.3.js – http://gsgd.co.uk/sandbox/jquery/easing/
jquery.isotope.min.js – http://isotope.metafizzy.co
jquery.colorbox.js – http://www.jacklmoore.com/colorbox
jquery.scrollTo-min.js – http://flesler.blogspot.com/2008/09/jqueryscrollto-14-released.html
jquery.knob.js – https://github.com/aterrien/jQuery-Knob
jquery.flexslider-min.js – http://flexslider.woothemes.com/
PHP:
Redux Options Framework – http://reduxframework.com/
Simple PHP Captcha script – http://www.abeautifulsite.net/blog/2011/01/a-simple-php-captcha-script/
Images and icons:
http://www.premiumpixels.com/
http://www.madebymolloy.com/49066/435465/work/illustrations
http://www.flickr.com/photos/gargar/page2/
http://maxwanger.com/travel
http://www.pixeden.com/media-icons/flat-design-icons-set-vol1