Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
Google Calendar - Spend less time managing your day & more time enjoying it
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
Business Calendar - Powerful and easy to use calendar app for Android including weather, widgets and tasks.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Jorte - Schedule books must be practical and has a good design.