Currently I'm working with Laravel 5, MongoDB, AngularJS, LaTeX, QTI and others.
I've also got experience with the following (click on a link to find out more about my experience):
Ubuntu and CentOS on AWS, Rackspace and Digital Ocean. Setting up the full LAMP stack, bash scripts, crontab, SSH and more.
Built a number of native Android apps (totalling over 50k+ downloads). Experience with in-app purchases. Also built an iPhone app (Apache Cordova).
WordPress, Pusher, Google Maps APIs