game-editor.com

For making a meter such as a health meter, there are many ways. One simple way that I don't think has been mentioned (although I havn't really looked) is to just have an animation with each animpos representing health value. This is good for some small things, but not good for something where you want to have a large number of values represented. (Try making an animation with 50,000 frames and you'll see what I mean).