I use OpenThatStuff (originally called CutPurse by kam). Kaz and I edited it to just open stuff that's in your bags. it can be found in my questing profile back in my blog.
it's also very user friendly to easily put in more stuff to open while you're leveling up.
Anti-drown is also very helpful (self explanatory)
These are the main 2 that I use as a user. As a writer, i also use Raphus' ProfileHelper. As well as the HB-shipped plugins of course