Giv - Snapchat & Instagram giveaways made easy
once fyi - Create privacy friendly one-time mailing lists
QuickReply.ai - Automate Chats on Website, WhatsApp & FB Messenger
Best Referral Programs - A curated directory of startup referral programs
Retweet Pick - Retweet Pick is a random name generator for Twitter giveaways via generating a winning name from the list.
Viral Loops for Startups - Virality for startups made easy 💪