Game programming ( SDL, C++, SFML, C# )

Simple DirectMedia Layer (SDL)
https://en.wikipedia.org/wiki/Simple_DirectMedia_Layer

SDL Tutorials
http://www.sdltutorials.com/

Getting Started With SDL

http://gamedevgeek.com/tutorials/getting-started-with-sdl/

Beginning Game Programming v2.0   (by Lazy Foo)
http://lazyfoo.net/tutorials/SDL/

TwinklebearDev SDL 2.0 Tutorial Index

http://www.willusher.io/pages/sdl2/

Aaron's Game Programming Tutorials
http://aaroncox.net/tutorials/2dtutorials/index.html
http://aaroncox.net/tutorials/2dtutorials/sdlclasses.html

The guide to implementing 2D platformers
http://higherorderfun.com/blog/2012/05/20/the-guide-to-implementing-2d-platformers/

SFML
http://www.sfml-dev.org/

SFML shaders
http://www.sfml-dev.org/tutorials/2.1/graphics-shader.php

Game Development Forum - C#

http://jharbour.com/forum/index.php?PHPSESSID=tpi1cfdcj0pe61dfgnv9l3ami6&board=22.0

Pixeljoint - tutorials, pixelart etc.
http://pixeljoint.com/pixels/tutorials.asp

OpenGameArt
http://opengameart.org/content/lpc-tile-atlas

GameArt2D
http://www.gameart2d.com/tileset.html

A Basic Sprite Tutorial
http://2dwillneverdie.com/tutorial/a-basic-sprite-tutorial/

Sprites resource
http://gamedevelopment.tutsplus.com/articles/10-great-full-game-sprite-sheets-from-graphicriver--gamedev-3797

Tiled Map Editor (tile leveleditor)
http://www.mapeditor.org/

Introduction to Tiled Map Editor
http://gamedevelopment.tutsplus.com/tutorials/introduction-to-tiled-map-editor-a-great-platform-agnostic-tool-for-making-level-maps--gamedev-2838

Tileset creation guide
https://github.com/hawkthorne/hawkthorne-journey/wiki/Tileset-creation-guide

Game Programming Tutorials
http://www.dreamincode.net/forums/forum/108-game-programming-tutorials/

Game Engines - GitHub
https://github.com/showcases/game-engines