The knowledgebase is a tool to help you build a knowledgebase. The knowledgebase is organized into various topics. Users ask questions pertaining to certain topics. The questions/answers are browsable by keywords. The data is stored in a relational database - MySQL. You need to have Apache with PHP3 and MySQL to use this tool.
WhatDaFaq?!? builds FAQ pages for your website. It's back end web interface and general design allow it to slot easily into your website, allowing you to put up FAQs quickly and easily.