Is there a good open source game editor for level designer?

Question

I find a good open source game editor (c / C ++ / objective-c) specifically for the level designer. I currently know the Tiled Map Editor , but it focuses only on the tile map.
In short, I need a tool that I can create for it many levels of the game (design, dragging game objects (actor, wall, ball, tree, etc.) into the screen editor, defining properties (density, restitution, friction, etc.) .d.) For each object, etc.), then exports all of them to an xml file, and my game code will be read from this XML file to create an interface.

Please comment if you do not understand my question clearly.

Many thanks in advance for any advice on this.
Tien

Answer 1

I have been looking for something like this for some time, and I think I found our answer in another question:

Check Nitro Level Editor - This is XML-based and suitable for almost any 2D game or application. http://nle.nickmania.com/

from this question

Answer 2

Game-editor.com is open source.