eClincher - eClincher offers social media management tool for marketers, businesses, brands and agencies.
Mailmeteor - Send hundreds of personalized emails with Gmail.
Buffer - Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!
Intutel - Intutel is a market intelligence cloud - a suite of monitoring & analytics tools to help brands/ marketers / market research companies
Streak - Manage customers inside Gmail