Website jsbsim.org

StatCounter, a free online visitor stats tool. It offers its members the chance to grow and improve their online businesses by allowing them to monitor the number of hits to their website; the geographical location of visitors; the various pages a visitor views; keywords used to find the site plus other features.

Piwik is an open source analytics platform currently used by individuals, companies and governments all over the world. With Piwik, your data will always be yours. Learn why Piwik is the right web analytics tool for you below.

See what your Facebook friends have liked, shared, or commented on across the Web. This includes all variations of Like, Share and Follow Buttons, Embedded Posts, Comments, Activity Feed, Recommendations Feed, Recommendations Bar, Like Box and Facepile.

Facebook's Like button is the quickest way for people to share content with their friends. A single click on the Like button will 'like' pieces of content on the web and share them on Facebook. You can also display a Share button next to the Like button to let people add a personal message and customize who they share with.

CloudFlare is a global CDN and DNS provider that can speed up and protect any site online.

Websites using some type of Facebook technology.

Content Security Policy is best used as defense-in-depth, to reduce the harm caused by content injection attacks.

Websites using https protocol.

The DOCTYPE is a required preamble for HTML5 websites.