(I think this is related to graph plugin, sorry if it's not the right plugin)
I use and enjoy SquirrelSQL mainly to connect to Oracle databases.
I like the query builder tool, I wish I could add views as I do with tables.
It looks like I can (a small "+" comes up when i drag the view over a new query builder window), but I can wait forever for the view to show up.
I use Squirrel 3.4.0 on Ubuntu Linux 10.10 and java 1.6.0_20