Software for Sequence Diagrams? [closed]

Question

I've been using NClass for object/class modeling in class thus far.

However, I do not believe that it is capable of sequence diagrams, which is my next task.

I would prefer not to use Visio. Is there a good and free software solution for making sequence diagrams?

Answer 1

There is www.websequencediagrams.com that is quite cool. I'm having trouble taking it seriously, but it does a really good job at very low effort from my side.