Google Calendar - Spend less time managing your day & more time enjoying it
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Jorte - Schedule books must be practical and has a good design.
VOGSY - Professional service automation tool built on Google G Suite
Business Calendar - Powerful and easy to use calendar app for Android including weather, widgets and tasks.
Office Timesheets - Professional Services Automation