Qpdfview 0.4.9 had been ported to OS/2 and eComStation. (2014/04/30)
File: ftp://ftp.netlabs.org/pub/qtapps/qpdfview-0_4_9-GA.zip

"This is a tabbed PDF viewer using the poppler library (same as Lucide), which uses the Qt4 libraries."
Requires Qt4: http://svn.netlabs.org/qt4
URL: http://svn.netlabs.org/qtapps/wiki/QT4 Office
Port by Silvan Scherrer.
Source: OS/2 Warp News and Rumors