Content Marketing Stack - A curated directory of content marketing resources
Popsters - Analyze your social media pages and spy on your competitors
Insense & Paid Media - Find creators for short-term and long-term partnerships
SocialRank - Graph search for TWTR. Filter by interests, location, etc
Top Instagram Influencers Ranking - Curated directory of Instagram bloggers by country&category
SaaS Startup Content Marketing Playbook - Proven content marketing tactics to grow your SaaS startup