FITS (Flexible Image Transport System) is a data format most used in astronomy. cfitsio is a library of ANSI C routines for reading and writing FITS format data files. A set of Fortran-callable wrapper routines are also included for the convenience of Fortran programmers.

DPF is designed to make development of new plugins an easy and enjoyable task. It allows developers to create plugins with custom UIs using a simple C++ API. The framework facilitates exporting various different plugin formats from the same code-base.

Typer is a library for building command-line interface (CLI) applications that users will love using and developers will love creating. Based on Python 3.6+ type hints.

WebKit is a web content engine, derived from KHTML and KJS from KDE, and used primarily in Apple's Safari browser. It is made to be embedded in other applications, such as mail readers, or web browsers.

Caddy is a multi purpose web server written in Go.

RADIUS (RFC 2865) provides a mechanism for authenticating and authorizing users to use network services.