Till today I have developed applications, using Oracle OAF(J2EE MVC based faremwork) and Oracle ADF using Jdeveloper. Now I want to develop a web application using any of the open source technologies. As most of my development experience is in OAF and ADF only, where I have mostly done things in drag and drop environment, now I stuck with which
framework to use(GWT,Seam,Spring) which can provide some similar kind of Drag and Drop(wysiwyg) RAD development environment. My web application will have following features:-
1) Online collaboration
2) Lot of search pages
3) Few CURD web pages.
4) web application will have good,flexible look and feel UI.
Please help me to find the right technology stack..?