Firebird Maestro is a powerful solution for the Firebird server administration and development. Key features include:
- database designer;
- complete data management tools with viewing, editing, grouping, sorting and filtering abilities and BLOB Viewer/Editor;
- Unicode/UTF8 support;
- handy SQL Editor with code folding, syntax highlighting, SQL formatter and multi-threading;
- visual query builder;
- comfortable access to the Firebird security features.

MiniUML is a plugin-based diagram editor, developed as part of a course at the Technical University of Denmark. Currently, it supports only UML Class Diagrams (as seen in Visual Studio), but it could theoretically support just about anything.

OntoUML Editor is a model-based graphical editor that supports the creation of conceptual models and domain ontologies in a philosophically and cognitively well-founded modeling language named OntoUML, which is based on the foundational ontology UFO. The editor is designed in a way that, on one hand, it shields the user from the complexity of the ontological principles underlying this language. On the other hand, it reinforces these principles in the produced models by providing a mechanism for automatic formal constraint verification.

ObjectArtist UML is a development tool to create UML diagrams, based on the UML 1.x model.

Vertabelo allows you to create your database model, work on it together with your team and generate SQL scripts instead of writing them manually.

Mia-Modernization is a customizable solution for modernizing J2EE legacy applications according to specific enterprise contexts :

* Retro-modeling : Java to UML transformations
* Refactoring : Java to Java transformations

Mia-Modernization can capture all the information contained within the Java or XML source files of any J2EE application (structure, variable definitions, statements, method invocations, ...) and provides a very powerful environment for defining transformation rules to apply on this information :

Umbrello UML Modeller is a Unified Modelling Language diagram programme for KDE. UML allows you to create diagrams of software and other systems in a standard format.

AmaterasERD is an Eclipse plug-in to draw ER diagram. AmaterasERD has following features:
* ER diagram graphical editing
* Import from existing database
* Generate DDL from diagram

ASA Maestro is a high-quality Windows GUI admin tool for Sybase SQL Anywhere server management, control and development. Key features include:
- database designer;
- handy SQL editor with code folding, syntax highlighting, SQL formatter and multi-threading;
- visual query builder;
- Unicode/UTF8 support;
- complete data management tools with viewing, editing, grouping, sorting and filtering abilities and BLOB Viewer/Editor;

XCase is a case tool for conceptual modeling of XML data based on MDA as it separates the conceptual modeling process to two levels: Platform-Independent and Platform-Specific Model. From each PSM diagram you can derive an XML schema describing a data view.