Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
TickTick - TickTickis a cross-platform to-do list app & task manager helps you to get all things done and make life well organized.
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
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
SolarWinds Service Desk - An IT service management (ITSM) solution that understands what it takes to successfully manage your employee services. Try Solarwinds Service Desk for free!