ViralSweep - Grow your fans and increase sales with sweepstakes and giveaways.
ShareThis - Grow your audience with easy-to-use sharing tools.
Retweet Pick - Retweet Pick is a random name generator for Twitter giveaways via generating a winning name from the list.
Shareaholic - Shareaholic is trusted by over 300000 brands, businesses, agencies, and individuals to grow website traffic and engagement 24 hours a day, 7 days a week.
Retweet Picker - Retweet Picker is an online tool that is helping you to select the random winner from Twitter for the giveaways.
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.