Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
RevResponse - RevResponse empowers advanced Publishers to viably adapt all types of B2B activity by means of automatic promotion advances, local publicizing, and the biggest stock of expert substance.
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
GatorMail - GatorMail is an email marketing platform from the communicator, founded in 2006 which features the ability to launch dynamic and mobile accessible email campaigns.
Zoho Desk - Industry's first context-aware Helpdesk Software
AWeber - AWeber is an Email marketing software that's easy to use. Send email newsletters & autoresponders and deliver top notch emails.