I know about Qt as an C++ software development framework for front end applications and I am aware of Eclipse as an IDE for Java and C++, but I was wondering if anyone could provide recommendations of any other IDE that allows rapid GUI application development on Ubuntu. To date all of my Ubuntu side development has been command line based and so Makefiles and Eclipse have been sufficient. Now I need to write a GUI app to run on Ubuntu and would welcome any suggestions of a good tool to do so. Many thanks