Codegiant - Codegiant - Issue tracking, git repositories, continuous integration and documentation in a single platform.
The Product Manifesto - Product Managers face the biggest challenges of our day, which is why our community needs a common set of product principles.
GoRetro - a free retrospective tool for your Agile sprints
Intercom on Product Management - The ultimate resource for aspiring product managers
Scrumpy - A simple, beautiful and agile project management software
Product School - The global leader in product management training