Owlnest

A roguelike, currently in Demo status.

Some of already implemented features:

extended action system with anything as the action target and context actions;
specific actions available at the moment, when special abilities are gained;
reactions - in cautious mode you can react to monster attacks using different counter-actions, available at the moment;
physics - realtime water and lava flow and objects burning, you can set entire forest into fire.
different types of wounds instead of plain hitpoints;
polymorph - you can basically morph into any monster, obtaining all its characteristics and possible actions (seems to be broken in current version);