Contests and sweepstakes are two different things. Sweepstakes give away prizes based on luck, contests award winners based on merit. The following tools can be used to create, track and promote sweepstakes and contests.
Interactwive Super easy to use, sets up and run contests on Twitter, allows custom branding and client links. No software to install, everything run online, collects tweets for you, view stats in real-time. Pay per contest (nice) or three monthly plans.
PromoSimple Create, design and monitor your contest or sweepstake in real-time. Integrates with Facebook, Twitter, Pinterest, can include polls and surveys. Free trial, three monthly plans.
OneKontest Contest tool run on Twitter, Facebook, Instagram, Vine and YouTube only. Easy process with a variety of content types (photo, trivia, voting), requires users to be following you to participate. Feedback contest reward users for their feedback, cool option. Can be set for multiple languages, schedules and shares promotions you are running on Google Plus and LinkedIn as well. Has an Android app only at this time, pay per contest or by the month.
Rafflecopter Tool sets up and administers giveaways (their term for sweepstake) as a way to grow your network and generate leads. Embed the giveaway entry form on your site or Facebook page, at end of promotion download entrants name, email etc). Three paid plans, discounts for an annual plan.
Social-Candy Facebook marketing and CRM solution. Built in promotion calendar lets you set up contests, sweepstakes, fan voting, petitions, etc to autorun, stats and reporting features. Cool fan ranking by engagement feature and competitive analysis available. Free trials with all four paid plans.
Viral Sweep Easily creates contests and sweepstakes targeted to your community, helps grow your email list and social following. Free and paid options.
Wishpond Offers contests for music, video, essay, hashtag, photo, and sweepstakes on Facebook, Twitter, Pinterest, website, and mobile. Real-time reporting offers detailed user guides and suggestion for each app. Four paid options, annual plan offer 14-day free trial
Woobox Runs a variety of contests including a photo, video, quizzes, coupons, and sweepstakes. Fully compatible with Facebook, Twitter, Pinterest, Instagram, YouTube, has retargeting options with Facebook. One free, four paid options.