Sparx Systems - Sparx Systems Enterprise Architect is a simple yet powerful visual modeling and design software solution that enable users to model business processes, design and create software system and model-industry-based domains.
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LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
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pgModeler - Open source data modeling tool designed for PostgreSQL. No more DDL commands written by hand. Let pgModeler do the job for you!