Python Programmer Websites and Blogs

effbot

C++ Programmer

Pete Isensee: Program manager on the Microsoft Xbox platform team.

Threads from stackoverflow

The Definitive C++ Book Guide and List
Git for beginners: The definitive practical guide

GNU Build System (Autotools)

The GNU build system, also known as the Autotools, is a suite of programming tools designed to assist in making source-code packages portable to many Unix-like systems. It comprises the GNU utility programs Autoconf, Automake, and Libtool. Other related tools frequently used with the GNU build system are GNU's make program, GNU gettext, pkg-config, and the GNU Compiler Collection, also called GCC.

Python

WikiBooks - Python Programming

XML

XML stands for eXtensible Markup Language. XML is designed to transport and store data. HTML is designed to display data.
W3School XML Tutorial

Design Pattern

Singleton Pattern - Wiki

Graphics Library

Cairo: Cairo is a 2D graphics library with support for multiple output devices. Cairo is implemented as a library written in the C programming language, but bindings are available for several different programming languages.
Skia: Skia ia s complete 2D graphic library for drawing Text, Geometries, and Images.

GTK

gtkmm - wiki
gtkmm: C++ Interfaces for GTK+ and GNOME
Programming with gtkmm

C/C++ Libraries

C Standard Library - Wiki