No, there is nothing currently available that will allow you to model in Alice. We are looking into a possible solution that we will update you on shortly.
(may need to use a slightly older version) to export some content (Unreal format is highly related to ASE). I don't think the above exporter handles animation though. May need a bit of hacking to get it working right.
Blender is Free under the GPL license (not certain what the scripts license is, have emailed the author).
If someone has a bit of programming skill, enhancing/creating exporters for Blender is really quite easy.