I just uploaded version 1.3 of my free responsive website editor
RocketCake. It includes some neat new features, like support for text shadows:
Which was interesting to implement. For example, the specification says that it doesn't give the exact way to implement this, but no pixel in the result image may not deviate by something like 5% from a certain specification. Ha. :)
Besides lots of other new stuff, I also rewrote the rendering algorithm so that website editing is now much, much faster if you are using many or big images. Previously, this was very slow on some systems.
Hope you like it!