Google Calendar
Free
Google Calendar is a cloud based calendar from Google.
FullContact
Freemium
FullContact gives you all the power of your address book, right in your Gmail inbox.
Google Contacts
Free
Google Contacts is Googles contact management tool that is available in its free email service Gmail.
Contacts
Commercial
Contacts is a default contacts management app for Mac based operating systems.
Microsoft Office Outlook
Commercial
Microsoft Outlook is a personal information manager from Microsoft.
OpenProject
Open Source
OpenProject is a web-based project management system for location-independent team collaboration.
Memotoo
Commercial
Memotoo sync all your contacts from Gmail, Facebook, phone, Thunderbird, Outlook, etc in a single address book.
AOL Mail
Free
AOL Mail (Aol Mail) is a free web-based email service.
Compare Kontact with alternatives
Compare Google Calendar and Kontact and decide which is most suitable for you.
Compare Microsoft Office Outlook and Kontact and decide which is most suitable for you.
Compare FullContact and Kontact and decide which is most suitable for you.
Compare OpenProject and Kontact and decide which is most suitable for you.
Compare Google Contacts and Kontact and decide which is most suitable for you.