The Product Management guide - A book on how to create and ship products that people love
Nova Inbox - Personalize emails in seconds, right from your inbox
Intercom on Product Management - The ultimate resource for aspiring product managers
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.
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.
Mailblast - Email marketing on a budget using Amazon SES