VerifyShare - instagram, instagram tools, giveaway, parsing,
Giv - Snapchat & Instagram giveaways made easy
ViralSweep - Grow your fans and increase sales with sweepstakes and giveaways.
Retweet Pick - Retweet Pick is a random name generator for Twitter giveaways via generating a winning name from the list.
WASK.co - All-in-one digital marketing software
Retweet Picker - Retweet Picker is an online tool that is helping you to select the random winner from Twitter for the giveaways.