Interesting links and more
"The Queen’s Gambit" Chess Boom Moves Online
chess-problems-gr.blogspot.com/
kallitexniko-skaki.blogspot.com/
www.ozproblems.com/problem-world
Chess problem corner - India Chess Federation
www.apronus.com/chess/diagram/editor/
Australian Chess Problem Composition
https://sites.google.com/site/edusadier/theartofdirectmateintwomoves