Create hand-drawn animation using both bitmap and vector graphics

 Pencil2D is an animation/drawing software for Mac OS X, Windows, and
 Linux. It lets you create traditional hand-drawn animation (cartoon) using
 both bitmap and vector graphics.
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 The basic features of Pencil2D are:
  + layers support (separated layer for bitmap, vector and soud part)
  + bitmap drawing
  + vector drawing
  + sound support