MX Query Builder allows table relation management, automating SQL query generation in a visual interface. It manages tables, relations, and conditions for queries in your Web browser, and integrates the resulted SQL directly in Dreamweaver, allowing you to use the server behaviors with it.
DoXFS (pron. docs-eff-ess) is a document management system that uses the XFS filesystem to store both content (files) and meta-data (file attributes), bypassing the traditional architecture of filesystem and database, and leveraging the built-in advantages of XFS. Currently, it offers a Web frontend based on PHP and standard management functionality (create, delete, attributes add/delete, etc.) as well as extras such as versioning and Full Text Indexing (using Namazu).
JCards is a Java application designed to store and manage data in any format that the user defines. Instead of having multiple applications/spreadsheets/databases to manage passwords, tasks, shopping lists, etc., JCards allows the user to define a database that contains the fields they want. This is accomplished via an easy to use interface that requires no understanding of SQL or any other database jargon. JCards was initially developed for PDAs, but has now branched into another version that is suitable for the modern desktop environment and includes a number of extra features.