Software Product Management Stack - Resources & tools to help you manage your software product
Nova Inbox - Personalize emails in seconds, right from your inbox
The Product Management guide - A book on how to create and ship products that people love
SendX.io - SendX (https://sendx.io) provides remarketing and retargeting tools for web businesses. You can use popups, landing pages, email, web push notification, automation workflows and FB / Google retargeting to drive more revenue.
Product Management Exercises - A repository of product manager job interview exercises
Mailblast - Email marketing on a budget using Amazon SES