What language do you use? And what for do you need UML (and what type diagrams)? For example, IDEA products for Java has some tools for class diagrams MS vis

What language do you use? And what for do you need UML (and what type diagrams)? For example, IDEA products for Java has some tools for class diagrams MS visio is nice too as tool for just painting UML But main problem with UML - synchronization with code base