Hi I'm the developer behind Emo Vote.
Guest users not allowed to Vote (show window saying Plz Login)
Quite easy to fix. But it doesn't have that high priority.
Option to show different "text" before & after Voting.
Do mean the labels for each button or the optional text above the options?
Allow only to Vote once.
That's abit tricky. Either you allow every ip-address to vote once. If severeal users have the ip-address only one of them will have the ability to vote. That's why I choosed to prevent users from voting twice using cookies. Ofcourse you can simple delete the cookie and vote again and again.
Widgets to Show Most/Recent Voted posts
Will come with the next version.
Thanks for the feedback, keep em' coming!