Azendoo - Azendoo is a collaborative task management solution that helps companies to get work done easily and in teams.

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

Taskade - Make lists, organize your thoughts, and be inspired to get things done. Taskade is a collaborative space for your tasks.

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

Flow - Stop managing projects from your inbox.

HelpScout - Help Scout is a simple, straightforward way to provide excellent support