I'm working on a editor for animated models. It started as a demo for my debugging library, but it's grown into something which might soon be a usable tool. It could be used to make simple edits to models (such as Jaime) which are available only in J3O format, or by people (such as me) who struggle with Blender's user interface.
Currently it has the ability to load a model, rotate it, view the skeleton, dump the scene graph, play animations at various speeds, rename bones and animations, edit bone angles, and add new (zero-duration) animations. The save button doesn't work yet; that's probably its biggest hole.
In this screenshot, I'm playing peek-a-boo with Jaime.
The editor is open-source, of course, part of my jme3utilities project on GitHub. The app's name is PoseDemo, and it's in the 'tests' subproject. Feel free to experiment with it.
PS: I've created a separate project/repo for the model editor, which I'm calling Maud: