tech/pg-dbms
https://pgxn.org/ show all the extensions of PG, also the private one.
This library add Machine Learning https://madlib.apache.org/
https://github.com/dhamaniasad/awesome-postgres
This pages shows the observability params of PG https://pgstats.dev/
Distributed PG https://github.com/citusdata/citus
Check also PG nesting queries, as used by this tool https://github.com/leontrolski/sqlsk
http://bloom-lang.net/index.html Graph database
https://github.com/agroal/pgagroal
https://greenplum.org/ massively parallel version
https://www.citusdata.com/ distribuited tables
https://github.com/postgrespro/zson - compress jsonb data
PipelineDB: OSS version that can support open streamed queries, with time-frame windows - https://www.pipelinedb.com/
https://github.com/antonmks/Alenka - GPU database engine
https://github.com/wal-e/wal-e - archive/backup PG using the WAL