Kig is a program for exploring geometric constructions. It is meant as a better replacement for such free programs as KGeo, KSeg and Dr. Geo and commercial programs like Cabri. Kig is free software, as in ”free speech”. This basically means that you do not have to ask my permission to use it, to improve it, to distribute or even to sell it. The only thing that you are required to do is to pass on these rights if you distribute Kig. Of course, this section is not meant as a legal text, and you should read the GPL license if you want to know what your rights are. Kig is meant as a useful and powerful utility for high school students and teachers, and as a fun project for me and others. I have learned a lot by working on it, and it’s fun to work together with other people on it. I’ve written much of the Kig code myself, but I’ve also had a lot of help from other people. Please see the about box for more information.