Here is a first try for a freecraft UI [*], and here a first try to give some decent tiles to freecraft [*]
As you can see, consistency of all this stuff is far from perfect, but for the moment I refuse to stick to one way of doing things, otherwise I could not discover new drawing methods with gimp. So once I will have made all the icons for freecraft, I will upgrade the firsts I've made. Then everything will be correctly shaped to be consistent.
As I upload this pages each time I made several icons, it's hard for me to maintain these packs up to date.