Daily Chess Puzzles: http://www.chessstepsonlinelessons.com/blog

Susan Polgar Chess Blog: https://www.themaven.net/chessdailynews
United State Chess Federation (USCF): http://www.uschess.org/
Chessbase: http://en.chessbase.com/

Internet Chess Club (ICC): http://www.chessclub.com
Chess.com: http://www.chess.com
ChessKid.com: http://www.chesskid.com
Free Internet Chess Server (FICS): http://www.freechess.org/
Playchess.com: http://play.chessbase.com/js/apps/playchess/

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Steps Method: http://www.stappenmethode.nl/en/