I've been using this for working out a little opening animation. The production is for a public library affiliated event. So, I thought it was nice to have free, cross-platform software involved. I need to wrap this up in another week and will eventually have some links.
I can't say much for the vector tools. Anime Studio Pro is really the best thing for that. But, the raster drawing in Pencil is addictive!!!
I hope Pascal and Patrick get enough donations to keep this going.