GIS::Distance calculates distances between geographic points on, at the moment, planet Earth. Various FORMULAS are available that provide different levels of accuracy versus speed.

PETSc is a suite of data structures and routines for the scalable (parallel) solution of scientific applications modeled by partial differential equations. It employs the MPI standard for all message-passing communication.

Memcached is a caching daemon designed especially for dynamic web applications to decrease database load by storing objects in memory.

KDecoration2 is a library to create window decorations. These window decorations can be used by for example an X11 based window manager which re-parents a Client window to a window decoration frame.

This PostgreSQL extension shows the query plans of all currently running SQL statements. Plan output format can be plain text (default), JSON, YAML, or XML.

Mailparse is an extension for parsing and working with email messages.