In the past few years, we have covered plenty of themes that let you build a knowledge base and FAQ website for your products and business. WPHelpere is also worth a look. It is a knowledge base WP plugin that can be used to cover multiple products. It has a dynamic design with live AJAX search and voting system built-in.
WPHelpere saves you time by allowing you to use one site provide support for multiple products. It allows unlimited FAQ sections for each product. It has a drag & drop sorting feature. You can create multiple categories to organize your content.
This plugin comes integrated with over 500 font icons. It comes with RTL languages. You can find out more about it here.