
Styler/2, the user interface enhancer for OS/2 Warp 3 and 4, had been released as open source software under the GNU GPL V3 license.
Github: https://github.com/OS2World/UTIL-WPS-Styler_2
Source Code Hobbes: http://hobbes.nmsu.edu/h-search.php?key=styler2_src
More Information at: http://www.os2world.com/wiki/index.php/Styler/2
Special thanks to Alessandro Cantatore for allowing this.