When comparing wxWidgets vs Qt, the Slant community recommends Qt for most people. In the question“What are the best cross-platform GUI toolkits?” Qt is ranked 1st while wxWidgets is ranked 2nd.
Ranked in these QuestionsQuestion Ranking
Pro Open source
wxWidgets was started in 1992 by Julian Smart
Pro Truly native look and feel
It uses the platform's native API rather than emulating the GUI.
Pro Global community
The community behind Qt is both massive and approachable. Digia (also owners) are joined by the likes of Intel, KDAB, ICS, Canonical and numerous others in sponsoring development, while communities such as KDE also contribute significantly. Forums are active, mailing lists are open, irc channels chatting, git repositories well managed. Answers to questions are usually minutes away.
Pro Good documentation
Professional, thorough documentation with examples, available either in a web browser or in the stand-alone desktop client called assistant.