I am looking for free online (flash, silverlight, or javascript - simply "browser-based") tool for creating UML diagrams & ER diagrams. In the past, there was great tools like cacoo.com, creately.com, gliffy.com, or lucidchart.com. But now, they are all paid or limited for free users.
So, is there any free online tools, which can do that?
Thank you for your tips.
EverGraph is free for use and despite being notation agnostic can handle program structure / architecture visualization: http://evergraph.io