KDiff3 had been updated to version 0.9.96 (2011-09-27)
http://svn.netlabs.org/qtapps/wiki/QT4%20Development
You require Qt installed on OS/2-eCS to run this port.
"KDiff3 is a program that compares or merges two or three text input files or directories, shows the differences line by line and character by character (!), provides an automatic merge-facility and an integrated editor for comfortable solving of merge-conflicts."
Source: Silvan Scherrer on Twitter.