Google Calendar - Spend less time managing your day & more time enjoying it
Clearbit - Clearbit provides Business Intelligence APIs
Business Calendar - Powerful and easy to use calendar app for Android including weather, widgets and tasks.
Memotoo - Memotoo allows you to sync your data (contacts, calendar, tasks, .) with phones (iPhone, Android, Samsung, ..
Jorte - Schedule books must be practical and has a good design.
Free Address Book - In our contact management software you can store fast and easily name, phone numbers, birthdays, address, company name, city, mobile numbers, insurance and loan info, e-mail addresses.