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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.
If you are comfortable in Blender you could have a look at https://github.com/RuthAndRoth/Ruth2. That is an AGPL-licensed mesh body for SL/OpenSim that is meant to be a teaching project and would be a good starting point so you are not coming from scratch. IIRC the head used is based on one released during Bento development, the body is original work from Shin Ingen and Ada Radius.
NOTE:
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Hence, a higher number means a more popular project.