Website Scripts have recently released the Pro edition of their PHP Knowledge Base Manager. Knowledgebase Manager Pro is an web-based system developed to support and enhance the organizational processes of knowledge creation, storage, retrieval, transfer, and application.
It is featured with user and group management support, allows unlimited publications for your knowledgebase content, supports multiple ways of visitor feedback gathering, provides high safety of your data with built-in automatic database backup system, article versions history, and allows recovering of deleted articles. We made use of modern Ajax technology and followed Web 2.0 design and usability trends to make Knowledgebase Manager Pro knowledge base management software fast and convenient.
You can check the feature tour for more about the product features, and try out their online demo here