Apache is a free and open-source cross-platform web server software.
Drupal is a free and open-source web content management framework.
Linkedin Sign-In is an authentication system that reduces the burden of login for users, by enabling them to sign in with their Linkedin account.
SoundCloud widget gives you the ability to upload, manage and share tracks.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.