Content Idea Generator - Free tool creates ideas for your content marketing strategy

PersistIQ - It takes multiple touch points before a lead engages. PersistIQ automates the tedious parts while preserving the key human elements of sales

Content Marketing Stack - A curated directory of content marketing resources

Skrapp.io - Skrapp.io is the easiest solution to extract leads from Linkedin. In few seconds, you can find email addresses and launch your email prospecting project.

Zestack - Stackoverflow for marketing & growth

Clearbit - Clearbit provides Business Intelligence APIs