Essential plugin to vote on NextGen galleries, thanks to this I can have contests on my site.
The developer of this plugin is the most helpful one I've seen, asked twice for implements and both times he hacked up some code for me with what I asked for. Simply: genius.
I encourage you to try it, buy the premium version or just donate to him, just read the threads and you'll see how he deserves it. I will probably do it soon.