Content Idea Generator - Free tool creates ideas for your content marketing strategy
Makerbook - A directory of the best free resources for creatives
Content Marketing Stack - A curated directory of content marketing resources
Nawvel - Nawvel is a handy-dandy library of tried, tested & curated resources.
Keyword Tool & Content Assistant - Content optimization tool to boost your rankings
The Starter Kit - Curated resources for web developers and visual designers