Pickerist - Instagram raffles from comments on 1-click
VerifyShare - instagram, instagram tools, giveaway, parsing,
Giv - Snapchat & Instagram giveaways made easy
Freeplee - Free raffles service with content, created by users
Retweet Pick - Retweet Pick is a random name generator for Twitter giveaways via generating a winning name from the list.
once fyi - Create privacy friendly one-time mailing lists