Lightning
Open Source
Lightning App Builder is a point-and-click tool that makes it easy to create custom pages for Salesforce1 and Lightning Experience.
Kolab Community
Open Source
Kolab is a free and open source groupware suite.
fruux
Freemium
fruux is a cross-platform synchronization service.
Rainlendar
Freemium
Rainlendar is a calendar program for Windows, Mac OS X and Linux.
Kontact
Open Source
Kontact is a personal information manager and groupware software suite developed by KDE. It supports calendars, contacts, notes, to-do lists, news, and email.
Kontact - KOrganizer
Open Source
KOrganizer is the calendar and scheduling component of Kontact, the integrated personal information manager from KDE.
Compare Google Calendar with alternatives
Compare Lightning and Google Calendar and decide which is most suitable for you.
Compare Rainlendar and Google Calendar and decide which is most suitable for you.
Compare Kolab Community and Google Calendar and decide which is most suitable for you.
Compare Kontact and Google Calendar and decide which is most suitable for you.
Compare fruux and Google Calendar and decide which is most suitable for you.
Compare Kontact - KOrganizer and Google Calendar and decide which is most suitable for you.