1)   TurnAbout 1.0
TurnAbout is a free Internet multiplayer Arcadia game creator which allows you to craft and share your own multiplayer games, using the Arcadia multiplayer game/chat/server environment. It comes with some games to start you off, then you add more!

 2)   PlayBasic 1.33
PlayBasic is a powerful 2D game creation language. Made for everybody (beginners and game designers) and includes as many built in features as possible. Letting programmers focus on making great games quickly.