Mattermark - Ranking 800,000+ high growth Internet companies
100 in 100 Challenge - Get 100 new paid users in 100 days
Breakout List - A list of the fastest growing startups
GrowthHackList - 100+ curated growth hacks for makers + early stage startups
Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Marketing Examples - A gallery of real world marketing case studies. Updated every day.