-
GB-Studio-Community-Assets
A repository of user-submitted original assets usable in GB Studio, with no attribution required.
-
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 some stuff here (not public domain though). I really don't know of any tutorials or where else to look, sorry.
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.