Software developed by DRK, unless otherwise stated, is Freeware.
This means that is fully copyrighted and is not in the public domain. All rights are retained by the author (DRK).
Freeware distribution allows individuals, profit and non-profit organizations to use the software at no charge. The software cannot be "sold", "rented", or otherwise distributed in a "for profit" enterprise.
DRK Software is devoted to promote Free software development over Windows platform. DRK starts doing it by publishing Freeware tools like NoCache and TCP/IP Builder.