ClustrMaps widget is a visitor tracker, designed for general web and blog use.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
SoundCloud widget gives you the ability to upload, manage and share tracks.
SWFObject is an open-source JavaScript library used to embed Adobe Flash content onto web pages.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.