Here is a list of all documented files with brief descriptions:

Bbox2.h
Circle2.h
Color.h
ConstraintGraph2.h
ConstraintSegment2.h
Edge2.h
Fade_2D.h
FadeExport.h
freeFunctions.h
Label.h
MeshGenParams.h
MsgBase.h
Performance.h
Point2.h
PShape.h
Segment2.h
SegmentChecker.h
testDataGenerators.h
Triangle2.h
TriangleAroundVertexIterator.h
UserPredicates.h
Vector2.h
Visualizer2.h
VoroCell2.h
Voronoi2.h
VoroVertex2.h
VtkWriter.h
Zone2.h