GrowthHackingIdea.com - One short, curated growth hacking idea a day to your email
growth.email - Weekly curated email with the best growth marketing articles
GrowthHackers Projects - Growth collaboration software for teams 📈
Great Email Copy - A dose of emails from around the web.
Weavr Cafe - Weavr is a platform to build active learning communities.
Really Good Emails - A large collection of good product email design.