LVLX will obviously take the longest, so I'm doing TEXDEFs first and then ANIMDEFs next in their own editor. There's too much to LVLX to really fit it in the same program to be honest.
EDIT VERY LATE:
I have indeed made the tools and stuff now. In fact a while back.
The thing is I'm working to learn GL stuff to make this easier and faster (performance-wise). XNA is good, but there are a lot of parts that are too slow and the only fast ways are meant for one-off processes.
It will be a bit before work on the engine kicks off, but trust me when I say it's literally GL I'm working on.