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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.
There's quite a few. One of the best ones is definitely EasyExploits API, with the downside it's not that strong and opens their website on injection, but it's fairly easy to use if you're a beginner. If you have some C/C++ experience you can try looking at Axon or search the internet (and this subreddit in particular) for some open source DLL's.
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.