Popsters - Analyze your social media pages and spy on your competitors
Startup Stash - A curated directory of 400 resources & tools for startups
SocialRank - Graph search for TWTR. Filter by interests, location, etc
Startup Buffer - Startup Buffer is a premium startup directory for emerging startups all around the world.
SaaS Startup Content Marketing Playbook - Proven content marketing tactics to grow your SaaS startup
Makerbook - A directory of the best free resources for creatives