GIMP tutorial that will teach you how to make to a Post-it or Sticky Note in GIMP. It’s an easy to follow tutorial that will also teach you some awesome gimp tricks that let you know how to sharpen a rotated text layer and how to use the IWarp filter to create curves.
The font used is Marker SD
http://www.dafont.com/search.php?psize=m&q=marker+sd