Keeper is an open-source calendar syncing tool that can be used to sync the blocks of time marked as "busy" on your personal, work, business and school calendars.




Calensync is described as 'Allows you to synchronize multiple Google Calendars together, including from different account!' and is an website in the office & productivity category. There are six alternatives to Calensync, not only websites but also apps for SaaS. The best Calensync alternative is Keeper, which is both free and Open Source. Other great sites and apps similar to Calensync are OneCal, SyncThemCalendars, Neocal and SYNCDATE.
Keeper is an open-source calendar syncing tool that can be used to sync the blocks of time marked as "busy" on your personal, work, business and school calendars.




OneCal is a productivity tool that aims to make calendar synchronization as easy as possible. It has a very intuitive UI, supports multi-way syncs, and is fully configurable (you can choose to sync event titles, descriptions, and participants, assign colors to clone events...




SyncThemCalendars allows you to block time in one calendar based on events in another calendar.
Multical is a calendar syncing app for fractionals, consultants, multi-hyphenates and portfolio careerists who want to stop getting double booked across clients.

