AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
Apache is a free and open-source cross-platform web server software.
Clicky is web an analytics tool which helps you to get real-time analysis including spy view.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.