You can try NewEdit for a test.
I'm the only person developing the software. I hope it can fit you. There are not so much English documents now.
I've tried playing with NewEdit, it looks promising, but it still has quite a few rough edges. The thing is, I don't see an easy way of feeding back to you the problems I'm hving, the issues I'm getting, and so on.
But yeah, it could be quite good.