knotter version 0.9.3 has been ported (2013/06/06) to OS/2. This Qt4 app allows you to design interlace patterns used as decorations.
Link: ftp://ftp.netlabs.org/pub/qtapps/knotter-0.9.3-os2.7z
Requires Qt4: http://svn.netlabs.org/qt4
Ported by Elbert Pol.