Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
JouwWeb is an online website builder that allows internet users to create own website.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
SoundCloud widget gives you the ability to upload, manage and share tracks.