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deepin-ext-cal-sync
Discontinued Program to sync external calendars like google calendar to Deepin Linux System Calendar.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I think you can say the answer is "mostly" no right now. There is a project that does allow limited sync capability with Google calendar. You can take a look at it here: https://github.com/sudipmandal/deepin-ext-cal-sync
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Hence, a higher number means a more popular project.