growth.email - Weekly curated email with the best growth marketing articles
Crowdstack - Curated directory of crowdfunding resources
Great Email Copy - A dose of emails from around the web.
BackerTracker - Track crowdfunding projects and see how much they'll raise
GrowthHackingIdea.com - One short, curated growth hacking idea a day to your email
Attributer - Know what marketing channels are driving customers & revenue