Low-level unprivileged sandboxing tool used by Flatpak and similar projects

Beanstalk is a simple, fast work queue.

Reliable PostgreSQL Backup & Restore

Fast caching software with a focus on low latency and cpu efficiency.

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

pgreplay reads a PostgreSQL log file (*not* a WAL file), extracts the SQL statements and executes them in the same order and relative time against a PostgreSQL database cluster.

LevelDB implemented in C (unofficial -- not affiliated with Google in any way)