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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.
That being said, reading just the first papers that showed up on google, it looks like Q6 is an opensource software that is based on Gromacs and has a similar input/output regime as Gromacs that is capable of doing EVB. Repo is here: https://github.com/qusers/Q6
NOTE:
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Hence, a higher number means a more popular project.