This is a brief summary of the new features in Coin v2.1.0:

HardCopy Support: Vector output to PostScript.
FreeType and Win32 TrueType Font Support
Intersection Detection with SoIntersectionDetectionAction
SoLineHighlightRenderAction / SoBoxHighlightRenderAction and Multiple SoSelection Nodes
Compressed File I/O Support (see SoOutput::setCompression(), SoOutput::getAvailableCompressionMethods())
Additional Convenience Functions SoInput::setStringArray() and SoAction::apply(SoAction *)
NO_COPY SoSFImage CopyPolicy, SoSFImage::setValue with CopyPolicy::NO_COPY implemented.