The Landing Page Cookbook - A guide for makers who want to create better landing pages.
Waitlist API - Quick and easy waitlist with built in referral.
Landing Pages in MailChimp - Easy to build, custom landing pages for free
LaunchList - Create waitlist with referral for your product launch
Landingfolio - The best landing page designs for your inspiration.
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.