Qt version 4.7.3 has been refreshed (3/23/2013) for OS/2.
Please remember to sponsor this project to allow future releases.
Qt version 4.7.3 has been refreshed (3/23/2013) for OS/2. This is a cross-platform application and UI framework. Applications that use QT include VLC, SMPlayer, VirtualBox, Psi, Scribus, and LyX. The QT4 runtime libraries and plugins are necessary for running programs built with the QT4 library. Highlights include printing support through CUPS, drawing using SNAP or DIVE, support for WebKit including SSL, and context sensitive help. Development is funded by donations from the community; sponsor units can be purchased from the Mensys online shop. This release is available in ZIP and RPM formats; older versions must be uninstalled first. This refresh includes support for path rewriting and symlinks. There has not yet been any activity on supporting Qt 4.8.x, which would include a newer version of Webkit for Qt-based browsers like Qupzilla and Arora.

Source: OS/2 Warp News and Rumors