Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
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
ActiveCampaign - Integrated email marketing, marketing automation, and small business CRM. Send beautiful newsletters, setup behavioral based automations, and benefit from sales automation.
Abhisi - Abhisi provides a helpdesk solution that seamlessly integrates with all communication channels used by the customers.
Pardot - Salesforce B2B marketing automation