Mailmeteor - Send hundreds of personalized emails with Gmail.

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

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!

LiveAgent - LiveAgent is a fully-featured web-based live chat and help desk software. It harnesses the power of a universal inbox, real-time live chat, built-in call center, and a robust customer service portal. Start your free 1 month trial today!

Interseller - Interseller helps find contact information, reach out to them with email automation and syncs it all into your database.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.