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zint
Discontinued A barcode encoding library supporting over 50 symbologies including Code 128, Data Matrix, USPS OneCode, EAN-128, UPC/EAN, ITF, QR Code, Code 16k, PDF417, MicroPDF417, LOGMARS, Maxicode, GS1 DataBar, Aztec, Composite Symbols and more. [Moved to: https://github.com/zint/zint] (by woo-j)
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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.
Been a while since when I used it, but there’s Zint at https://www.zint.org.uk which a cross platform barcode generating solution but also does QR codes
Github: https://github.com/Pingu1337/qude
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