Don't even think about exporting this program out of the country. Copylefting Copylefting is an ingenious scheme promulgated by the GNU Project under the aegis of the Free Software Foundation which uses the Copyright law to ensure that copylefted code remains freely available. The concept seeks to utilize the licensing mechanism to ensure that all subsequent users of a copylefted program will have access to the source code of the software, and that any improvements or modifications that they may make to the software will likewise be made available to all subsequent users. Freeware Freeware is like shareware, except the software producer does not charge any license fees. With freeware, the software producer still retains copyright, and it generally comes with many of the restrictions found in shareware or fee licensed software about disassembly and reverse engineering of code.
All creative works end up in the public domain eventually.
As seen in the Copyright Fundamentals section, this can take quite some time. However, the software producer is free to forego his copyrights and grant the software to the Public Domain. In this case, anyone is free to use, copy, fold, spindle or mutilate the software. But as pointed out in the context of Copylefting, this is not always the best way to bequeath your software to the world since others are free to make modifications to the software, thus creating derivative works which can be protected by the modifier.