Really Good Emails - A large collection of good product email design.
Landing Pages by Viral Loops - Easily create a landing page for your referral campaign ✌️
Good Sales Emails - Best sales emails from great companies
Best Referral Programs - A curated directory of startup referral programs
Great Email Copy - A dose of emails from around the web.
Rewardful - All-in-One Affiliate Management Software for SaaS