The first public signal is GitHub stars. Stars do not measure quality. They do not measure production usage. And they miss projects that do not hosted on GitHub at all. like postgres and postgis. But stars are still useful. They show attention, reputation, and rough awareness. Familiar names appear near the top: TimescaleDB, pgvector, Citus, pg_search, pgml, pgai, pgmq, and many others. If we look at the distribution, it is extremely skewed. A few extensions get most of the attention, and then there is a very long tail. It's a logarithmic distribution

Part II : The Ecosystem Landscape

GitHub Stars

PIGSTY

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Snapshot: pgext.universe / star_cnt / lead packages