Another door, swing door, also has special hinges that allow it to open either outwards or inwards, and is sprung to keep it closed. As the swing door you can see in public toilet, it often looks like a screen to keep others away.

A selfbolting door is called as such because of its special hinges that permit the panel leaf to move laterally so that the door itself becomes a giant bolt for better security result. The selfbolting door principle can be used both for hinged doors as for rotating doors, as well as up-and-over doors (in the latter case, the bolts are then placed at top and bottom rather than at the sides).

Some hinges are specially designed to make the door more individual. Take the picture above for example, the hinge looks like a root of tree which perfectly matches the wooden door.