WhiteStarUML - WhiteStarUML is a fork of StarUML with an intent to revive its Delphi code base by updating code to...
draw.io - Online diagramming application
System Designer - System Designer is a low code development platform that you can use to create UML-based models.
Nektony Mac Visio Viewer - Nektony Mac Visio Viewer is a fully featured application for Mac OS X operating systems to view MS Visio files.
Topcoder - The Topcoder home page has received a slick new makeover that lets new customers quckly login, discover the power of our community, and launch challenges.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.