SVG canvas widget for Tk
TkPath is an advanced canvas widget for Tk originally written by Mats Bengtsson. It implements path drawing modelled after SVG, and is very flexible and reproduces all standard drawing canvas items. For drawing, TkPath uses CoreGraphics on Mac OS X, GDI+ or GDI on Windows, Cairo on X11, and Tk drawing as a fallback.
TclBitPrint was the original project by Mats to enable printing on Mac OS X. See documentation for maccarbonprint here.