MonetDB
An open source database system for high performance applications in data mining, OLAP, GIS, XML Query, text and multimedia retrieval. It often achieves a 10-fold raw speed improvement for SQL and XQuery over competitor RDBMS systems. It features a storage model based on vertical fragmentation, a modern CPU-tuned query execution architecture, automatic and self tuning indexes, runtime query optimization, and a modular software architecture.

By: CWI
Requires: Windows 2000/XP/Vista, Unix/Linux
Price: Free GPL

MySQL Query Analyzer
MySQL Query Analyzer is a simple to use tool for creating SQL scripts for the MySQL database engine. Create queries and other SQL scripts and execute them, create commonly used database objects from predefined scripts using templates.

By: Coderband
Requires: Windows 2000/XP/Vista
Price: Free

Manifold Database Commander
A universal command and control console for almost any database. It allows you to see your data and relationships quickly and easily. Browse, find, transform, analyze and so much more.

By: CDA International Ltd.
Requires: Windows 98/2000/Me/XP
Price: $145.00

Free Database Compare
Compare the structure of two databases and display all differences between them. Supported databases include SQL Server (all editions), MySQL and MS Access. Create snapshots of a database and compare a live database to a snapshot. Includes a database structure viewer.

By: StarInix Software
Requires: Windows 98/Me/NT/2000/XP
Price: Free

AppMaker
You supply the database and AppMaker supplies the software necessary for end users to work with the database. The software automatically wraps itself around SQL statements and creates a runtime application. Handles multi-user data entry, table maintenance, table relationships, special field editing and formatting, and reporting. Any database (MS Access, SQL server or ADO data source) can be imported.

By: West Heaven Solutions
Requires: Windows 98/2000/XP
Price: $149.00+