I used to use Andypic, which should be here: http://www.svatopluk.com/daggerfall/download/andypic.stm
For anyone interested, I just found this site: http://tamentis.com/projects/openscrolls/
The tools are relatively new, which is refreshing. They're just Python source files, but someone who's into programming might want to look at them. (edit: On second look, some of them are in C)