pgBackRest
Also called: pgbackrest, PostgreSQL backup tool
pgBackRest is a widely used open-source backup and restore tool for PostgreSQL. It manages a repository of physical backups (full, differential, incremental, and block-incremental) plus archived WAL, using PostgreSQL's own backup API, and restores to any point in time by replaying WAL on top of a chosen backup.
What this means
A popular open-source backup-and-restore tool for Postgres. It keeps a repository of physical backups (full plus various smaller ones) alongside the archived WAL, and can restore to any moment in time by taking a chosen backup and replaying WAL on top of it up to the point you want.
Why it matters operationally
It turns PostgreSQL's low-level backup primitives into a production-grade workflow with parallelism, compression, encryption, retention, offsite repositories, and point-in-time recovery. It is the de facto standard for serious PostgreSQL backup and disaster recovery.