Leadum DBScribe is a free powerful tool to document your MySQL database into HTML, CHM help, MS Word Documentation.
It supports:
rich set of output formats and styles
wizard and command line interfaces
complete database structure documenting
all SQL object types, their details and properties
custom documentation profile
DBScribe helps you to:
Dramatically reduce time and cost necessary to document your databases
Avoid document updating and synchronization after database changes
Manage your product/solution knowledgebase
Optimize communication between your IT team members: database administrators, developers, testers and technical writers
Increase your customer satisfaction by providing comprehensive, professional looking database documentation