Nope, all free... but if you really going to make a commercial game, better (really really should) use these icons here (and will be here) from now on since i'm going to make a BIG edit on all of them, most of these old icons are low in quality and poor in style (they're ruining my mind untill i eplace them all ).
Aside from icons my tileset, faces or characters whatever others are fine.
I have't quite gotten to use the icons (yet!) but I remember specially the plant tiles you made a long time ago. I've used them before (on a non commerical game) but are they avaliable for commerical too?
Tho it's awesome that we can use these icons already, holy **** look at those things @_@