glib

Libforger is a graphics library that uses OpenGL as its backend, and is designed for simple-use node-based 3D/2D rendering. With Python3 and Vala integration

This is Gnome's Glib core's hash-table data structure example in which user can store multiple values under same key. With good error checking and memory management.

HTTP Library for GLib - https://libsoup.org

JSON-GLib implements a full JSON parser and generator using GLib and GObject, and integrates JSON with GLib data types.