CHESSELLA is a web site where you can upload and share your (preferably annotated) chess games. The main reason I created this site, though, is to train my chess skills. Chess diagrams are printed in the games just before any critical move, so that you can stop at a diagram and try and guess the move.
You can search for games other users have uploaded. You can then export the games you found to the PGN format.
When browsing games, you can choose to watch a game. The simple game viewer allows you to go back and forth in the game, or to jump to a move. A link to the game can be seen at the bottom of the game viewer, so that you can link to the game from your web site.