GEOS provides a spatial object model and fundamental geometric functions. It implements the geometry model defined in the OpenGIS Consortium Simple Features Specification for SQL. Functions provided include:

icu_ext is an extension to expose functionality from ICU to PostgreSQL applications.

The ament build system is the most common way to build packages for ROS 2. ament_cmake provides the necessary tooling to build ament packages with CMake.

GAP is a system for computational discrete algebra, with particular emphasis on Computational Group Theory. GAP provides a programming language, a library of thousands of functions implementing algebraic algorithms written in the GAP language as well as large data libraries of algebraic objects. GAP is used in research and teaching for studying groups and their representations, rings, vector spaces, algebras, combinatorial structures, and more.

pg_wait-sampling is an extension which provides functions for detailed per backend and per query wait events statistics.

pg_snakeoil provides functions scanning PostgreSQL data for viruses using the ClamAV anti-virus engine.