Open-source vector similarity search for Postgres

Distributed PostgreSQL as an extension

An implementation of the TLS/SSL protocols

OrioleDB – building a modern cloud-native storage engine (... and solving some PostgreSQL wicked problems)

Run periodic jobs in PostgreSQL

Scalable PostgreSQL connection pooler

Hypothetical Indexes for PostgreSQL

HTTP client for PostgreSQL, retrieve a web page from inside the database.

Copy a Postgres database to a target Postgres server (pg_dump | pg_restore on steroids)

C library for accessing the PostgreSQL parser outside of the server environment

IVM (Incremental View Maintenance) implementation as a PostgreSQL extension

Postgres extension and service for automated failover and high-availability

ATTENTION: pg_shard is superseded by Citus, its more powerful replacement

RUM access method - inverted index with additional information in posting lists

CRDT support in Postgres (experimental)

MobilityDB is a geospatial trajectory data management & analysis platform, built on PostgreSQL and PostGIS.

Hierarchical Navigable Small World (HNSW) algorithm for vector similarity search in PostgreSQL

Basic implementation of Paxos and Paxos-based table replication for a cluster of PostgreSQL nodes

TopN is an open source PostgreSQL extension that returns the top values in a database according to some criteria

postgresql extension providing Active session history

Vixie Cron, an open source implementation of POSIX Cron, later imported into BSD and Linux

Compressed append-only pluggable storage for PostgreSQL 12+

r53db, the PostgreSQL Foreign Data Wrapper for the AWS Route53 Database service

Table replication for PostgreSQL nodes with Ceph and ZLog