Free: The MediaWiki software is used by tens of thousands of websites and thousands of companies and organizations. It powers Wikipedia and also this website. MediaWiki helps you collect and organize knowledge and make it available to people. It’s powerful, multilingual, free and open, extensible, customizable, reliable, and free of charge. Find out more and if MediaWiki is right for you.
Free/Buy: Smart Slider 3. Smart Slider 3 is the most powerful and intuitive WordPress plugin, to create sliders, which was never possible before. Fully responsive, SEO optimized and works with any WordPress theme. Create beautiful sliders and tell stories without any code.