PathToolkit (for Windows)

PathToolkit is a plug-in for Adobe Illustrator, extending the application with a set of powerful tools useful both for technical drawing and illustration. Draw circles and arcs in different ways, round arbitrary corners, trim and extend paths, connect open ends, or join multiple disconnected paths into a single shape - many drawing functions usually available in CAD systems only, are now in Illustrator.

Every time you deal with complex vector artwork, PathToolkit has something to offer to make your work done faster and simpler - just give it a try!