Depending whether you need to have a group of object as a graphical representation or a data set you might think of these:
1) use a Layout or a custom layout
2) use a containter to keep QObjects
3) use a groupbox
4) you may also develop a class like QActionGroup to hold a group of objects and have the interface like this class.
5) surely there are more ideas and surely faster, but these are just the ones that come to mind right now

kacper