Qt vs Ultimate++
When comparing Qt vs Ultimate++, the Slant community recommends Qt for most people. In the question“What are the best cross-platform GUI toolkits?” Qt is ranked 2nd while Ultimate++ is ranked 22nd.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Open-source
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.
Pro Visual designer
Pro Simple to use
The whole framework is easy to use.
Pro Documentation and help tool
Pro Code analyzer
Pro Easy to learn
The whole framework is easy to learn thanks to multiple tutorials.
Pro Free
Pro Helpful community
Cons
Con Strictly C++
Con This is an application development framework not simply a GUI toolkit / library API
It is designed for you to develop your whole application using it, not just your GUI. Most people probably are not really looking for that.