Cohort - Find the people you need through the people you already know
Intercom on Product Management - The ultimate resource for aspiring product managers
A Guide to Marketplaces - Everything you need to know about building a marketplace
userinput.io - Get on-demand feedback for your app, website or idea. Learn how to improve by hearing real opinions.
Cadre - Cadre is a technical staffing agency and recruiting firm.
ithinki - A simple user feedback tool for start-ups