Chessalyst

Chessalyst is a tool to play out a chess game, add comments (very buggy right now, sorry for that) and variations / side lines, and finally save the game as a pgn file.
It provides buttons to flip the board, add a comment before and after a move, promote a variation to the new mainline and delete moves. The game can be navigated through using the navigation buttons on the right hand side. It is also possible to set some meta data, before downloading the game.