The SharePoint Knowledgebase is a free, open source, web part that provides a structured knowledge base system for Microsoft SharePoint systems.

• Ability to add as many questions as you like
• Ability to add and categorize questions into categories (including multiple categories for a single question)
• Search capabilities to find questions and answers
• Rating for each question (was this helpful - yes/no)
• Add comments for each question
• Moderation of questions (or you can leave it open so questions are published immediately)
• View questions by category (with number of questions displayed)
• Quickly jump to any category instantly from the main page
• Assign related questions to other questions
• Attach any number of files to a question

This project was just migrated from it's original home on CodePlex so I'm just getting things cleaned up and setup here.