Apache is a free and open-source cross-platform web server software.
Bluefish is a free software text editor with a variety of tools for programming in general and the development of websites.
Contact Form 7 is an WordPress plugin which can manage multiple contact forms. The form supports Ajax-powered submitting, CAPTCHA, Akismet spam filtering.
Gravatar is a service for providing globally unique avatars.
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.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.
WP-PageNavi is a WordPress plugin which adds a more advanced paging navigation interface to your WordPress blog.