Please suggest tools for creating Class Diagrams with the following criteria:
- It should be platform-independent because I use Linux and the file is expected to be edited by other members of the team using Windows/Mac
- Free, because there no such free tool, we should create one
- It would also be nice if you can include a screenshot of the class diagram produced, just to make sure that the tool is actually used for creating Class Diagrams and not just any other types of diagrams
Also, please only suggest the tools that you've actually used.
UPDATE: Please DO NOT include those UML Diagram tools that cannot create Class Diagrams.