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.
draw.io - Online diagramming application
erwin Data Modeler - erwin Data Modeler provides a collaborative environment to manage enterprise data though an...
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.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
StarUML - StarUML