Retweet Picker - Retweet Picker is an online tool that is helping you to select the random winner from Twitter for the giveaways.
Mysocial - Powerful, creator tool-box to help you grow your followers, attract more clients and increase your revenue.From up and coming artists to mega influencers.
Tweetdraw - Tweetdraw is an online tool that provides an easy way to pick a winner for a giveaway, having a quick Twitter Quote Draw, Instagram Comment Draw, and Twitter Retweet Draw.
AiSchedul - Make Each Instagram Post Count
Giv - Snapchat & Instagram giveaways made easy
Techstars Entrepreneur's Toolkit - Online resource to help you learn about entrepreneurship