Waitlist API - Quick and easy waitlist with built in referral.
GetBadges - GetBadges is a gamification platform which allows developers to play and compete while using software development tools.
LaunchList - Create waitlist with referral for your product launch
Woohoo - Increase conversions by replacing popups with mini games
Waitlisty.io - Build excitement for your product by embedding a simple form into your website. Signups will receive a referral code to share with their friends. The more codes they share, the more they climb your waitlist.
Klujo - Klujo turns anonymous site visitors into loyal advocates using gamified funnels