Now that I saw what the Nxt's voting system is, I am disappointed. It appears that all votes are recorded in the blockchain in plaintext so that anyone can see who voted on what.
https://wiki.nxtcrypto.org/wiki/Voting_System "On the bottom of the pane, the votes cast in the poll are displayed while they are still available. For each voting account the account ID is shown along with the integer range value associated with each option voted for."
Most (if not all) cryptographic voting schemes are private (no one can see my vote) and receipt-free (I can't prove that I voted on a given option), this is done to avoid coercion and vote buying. Nxt's voting system is neither so it can't be used for any serious election. Despite that, there are articles saying it could be used in shareholder's elections, corporate governance (
http://cointelegraph.com/news/113414/nxt-teases-voting-system-two-phase-transactions-and-a-foundation) and even government elections (
https://www.cryptocoinsnews.com/nxt-decentralized-voting-system-twitter/). This is very misleading and it appears that a lot of people think that Nxt's voting system is secure when it is not.