(Here you can download an early version: http://www.andengine.org/files/AndEngineLevelEditor.jar the latest version shown below is not available yet.)
recently I got so incredibly frustrated by making levels using a plain TextEditor that I almost cancelled the project. So I decided to make sth to make me more productive...
So I started working on a LevelEditor tool. This LevelEditor is highly flexible as it generates XML code which you can enriched (even manually) with any kind of XML-attributes.
On the other end the developer doesn't even have to handle the actual XML parsing anymore as simple classes are available that make parsing a breeze.
This is what a resulting XML looks like:
And this is how it can look on an actual device (different level!):
Hope you like it I'll keep you up to date