Draven, might want to check your links. That ones been gone several months.
The kit is basically a collection of pixel art sprites you can arrange and create a sprite sheet.
But its not available anymore.
There is Charas, a web based system that's similar.
As far as bones go, there's Anime Studio. Its got just about everything your looking for.
It's available as a demo, and a pay version.
There's also Synfig. It doesn't have bones, but it does have some very nice tweening.
I understand a bones system is in the works tho....
It's also open source, so it's free.