VerifyShare - instagram, instagram tools, giveaway, parsing,
AddThis - AddThis free website tools include share buttons, targeting tools and content recommendations help you get more likes, shares and followers and keep them coming back.
Giv - Snapchat & Instagram giveaways made easy
Buffer - Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
Retweet Pick - Retweet Pick is a random name generator for Twitter giveaways via generating a winning name from the list.
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.