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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.
Shameless plug: I built an open source, completely free, no ads/tracking whatsoever sudoku with a lot of bells of whistles. It’s only web based, so no native apps. Find it here: https://sudoku.tn1ck.com/
Source is at https://github.com/TN1ck/super-sudoku if anyone is interested
What about SudoQ[1]? That's the one I used many years ago during my sudoku phase. It's open source, very simple, accepts "drawing" input as well as regular keyboard.
1. https://github.com/timo-a/SudoQ
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.