Startup Stash - A curated directory of 400 resources & tools for startups
growth.email - Weekly curated email with the best growth marketing articles
The Influencer Marketing Stack - Free resources to launch a killer campaign
Great Email Copy - A dose of emails from around the web.
Makerbook - A directory of the best free resources for creatives
GrowthHackingIdea.com - One short, curated growth hacking idea a day to your email