Bump! Updated with a bit of information about the new Vote 4 site - as I figure out some more about it, I will continue to update this.
Bump! Updated with information about Vote 4 - looks like this website allows you to vote once every 24 hours.
Currently vote 4 has disabled votifier and so you will not be able to get Nstars from it until November 30th.
Due to the beginning of daylight saving time in the US, Vote 1 now has daily resets at 5:00 PM PST rather than 4:00 PM.
Bump! Finally updated the original post with information about the two newest vote sites, Vote 5 and Vote 6!