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tatoeba2
Tatoeba is a platform whose purpose is to create a collaborative and open dataset of sentences and their translations.
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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.
As someone else suggested, Tatoeba is also a good option. Nowadays, I use it less and less because I prefer the more didactic sentences found on online dictionaries. Nonetheless, it's still very good, especially due to the sheer quantity of sentences you can find there.
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.