Apache is a free and open-source cross-platform web server software.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
SnapWidget is a set of interactive Instagram, Twitter and 500px widgets.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.