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!

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

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

TaskPaper - Plain text to-do lists for Mac

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

Magnetic - Magnetic is an all-in-one agency management software built for productivity.