I have mentioned some excellent open source grid view components in the past such as the
What makes this control different is that not only does it provide an excellent scrollable gridview component, but in addition each view responds to gestures and can be moved around by dragging and dropping, maximized, and minimized and more.
You can see how the control responds to gestures in this quick video demonstration:
The control does much more adjusting for the iPhone and iPad screens, and providing editable screen cells.
The control is from Gulam Moledina and you can find the source code at the Github repository