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osTicket
The osTicket open source ticketing system official project repository, for versions 1.8 and later
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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.
we use https://osticket.com/ It's not a groundbreaking ticket system but it's rock solid, user-friendly, and free.
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