The Linux Kernel is one of the most complex open source projects. There are a lot of books, however it is still a difficult subject to comprehend. The Interactive map of Linux Kernel gives you a top-down view of the Kernel. You can see most important layers, functionalities, modules, functions and calls. You can zoom in and drag around to see details. Each item on the map is a hypertext link to source code or documentation.
feature-rich and very fast scenegraph-engine. Its purpose is to deliver a toolkit for the creation of interactive 3D environments using the graphic-hardware of common desktop computers.
a 2D graphics library, support for multiple output devices. (output targets include the X Window System, Win32, image buffers, PostScript, PDF, and SVG file output. Experimental backends OpenGL (through glitz), Quartz, and XCB.
Encryption Toolkit that provides anyone with the ability to add strong security capabilities to an application in as little as half an hour, without needing to know any of the low-level details that make the encryption or authentication work.