Tools for creating Class Diagrams [closed]

Solution 1:

I use GenMyModel, first released in 2013. It's a real UML modeler, not a drawing tool. Your diagrams are UML-compliant, generate code and can be exported as UML/XMI files. It's web-based and free so it matches your criteria.

Solution 2:

I used Poseidon UML Community Edition, it's platform independent and makes fine and clean diagrams. There are some screenshots here.

Solution 3:

A nice online tool: yUML

Solution 4:

Some time ago I used DIA - free and platform-independent. It was ok. Now I use Enterprise Architect but it's not free.

Solution 5:

I always use Gliffy works perfectly and does lots of things including class diagrams.