Qt is a cross-platform C++ application framework. Qt's primary feature is its rich set of widgets that provide standard GUI functionality.

libportal provides GIO-style C APIs for most Flatpak portals' D-Bus interfaces. It is primarily intended for installation in Flatpak runtimes, where applications can use it to interact with portals; it can also be used to test the portal services.

The MagickCore API is a low-level interface between the C programming language and the ImageMagick image processing libraries and is recommended for wizard-level programmers only. Unlike the MagickWand C API which uses only a few opaque types and accessors, with MagickCore you almost exclusively access the structure members directly.

The libpwiz library from the ProteoWizard project provides a modular and extensible set of open-source, cross-platform tools and libraries. The tools perform proteomics data analyses; the libraries enable rapid tool creation by providing a robust, pluggable development framework that simplifies and unifies data file access, and performs standard chemistry and LCMS dataset computations.

Qt is a cross-platform C++ application framework. Qt's primary feature is its rich set of widgets that provide standard GUI functionality.

The RCSB Core Wrapper library was developed to provide an object-oriented application interface to information in mmCIF format. It includes several classes for accessing data dictionaries and mmCIF format data files.