The Short Version
SK Soft releases all its open source software under a public domain license. This basically means you can do anything you want with the code. No strings whatsoever. Read The Long Version for the exact legal language.
The Long Version
The person or persons who have associated their work with
this document (the "Dedicator") hereby dedicate the entire
copyright in the work of authorship identified below (the
"Work") to the public domain.
Dedicator makes this dedication for the benefit of the
public at large and to the detriment of Dedicator's heirs
and successors. Dedicator intends this dedication to be an
overt act of relinquishment in perpetuity of all present
and future rights under copyright law, whether vested or
contingent, in the Work. Dedicator understands that such
relinquishment of all rights includes the relinquishment of
all rights to enforce (by lawsuit or otherwise) those
copyrights in the Work.
Dedicator recognizes that, once placed in the public
domain, the Work may be freely reproduced, distributed,
transmitted, used, modified, built upon, or otherwise
exploited by anyone for any purpose, commercial or non-
commercial, and in any way, including by methods that have
not yet been invented or conceived.