deal.II is a C++ program library targeted at the computational solution of partial differential equations using adaptive finite elements. It uses state-of-the-art programming techniques to offer you a modern interface to the complex data structures and algorithms required.

A Vega *theme* is a configuration object with default settings for a variety of visual properties such as colors, typefaces, line widths and spacing. This module exports a set of named themes, which can be passed as input to the node-vega or node-vega-lite with node-vega-embed or directly as a configuration object to the Vega parser.

The p4est software library enables the dynamic management of a collection of adaptive octrees, conveniently called a forest of octrees. p4est is designed to work in parallel and scale to hundreds of thousands of processor cores.

The p4est software library enables the dynamic management of a collection of adaptive octrees, conveniently called a forest of octrees. p4est is designed to work in parallel and scale to hundreds of thousands of processor cores.

KTextAddons is a collection of text addons libraries developed by the KDE community.

Fcitx is a input method framework with extension support, which provides an interface for entering characters of different scripts in applications using a variety of mapping systems.