Product School - The global leader in product management training
Pagevamp - Turn your Facebook page into a website.
The Product Manifesto - Product Managers face the biggest challenges of our day, which is why our community needs a common set of product principles.
Kit CRM - A CRM for your Facebook page
Intercom on Product Management - The ultimate resource for aspiring product managers
Upcall - Upcall enables you to crowdsource your outbound calls. Collaborate with 1000+ on-demand callers worldwide for sales, marketing and customer support calls. Free trial.