Twitter #Hashtag-based Contests
OneKontest helps you to engage & reward your followers through Twitter contests.
#Hashtag Contests: Tweet a Twitter #hashtag to enter. You may also require users to follow your account.
Photo Contests: Tweet or upload a photo to enter. Services supported: Instagram, Twitter, TwitPic, Yfrog.
Video Contests: Tweet a video to enter. Services supported: Vine, Instagram, YouTube, Vimeo.
Trivia Contests: Answer a trivia question to enter. Winners are selected from the users who answer it correctly.
Feedback Contests: Answer a question to enter. Reward your users for their feedback.