Kig is an application for Interactive Geometry. It's intended to serve two purposes:
Allow students to interactively explore mathematical figures and concepts using the computer.
Serve as a WYSIWYG tool for drawing mathematical figures and including them in other documents.
You can report problems in Kig using the internal bug reporting tool ( → ).
Since Kig supports macros and the construction of loci, it allows for some rather advanced macros to be defined. If you have created an interesting macro, which you think might be useful for other people, please open a review request for the change, so that it can be evaluated for the inclusion in the distribution (if you do this, it will be licensed under the terms of Kig's license, the GPL, so that other people can freely use and adapt it).