BinaryVirtualizingWrapPanel .NET
Binarymission
Version: V7
World's first Virtualizing Wrap Panel for WPF and Silverlight
Supports Grouping of content even when virtualizing
Supports customizing group header rendering by accepting a custom data template
Supports IEditableCollectionView data sources (transactional edit commits)
Automatic re-virtualization/realization of items based on Filtering & Sorting of ICollectionView sources
Custom item size support
Multiple virtualization schemes
On-demand realizing of child items
Host millions of items, and still enjoy smooth scrolling user-experience
MVVM pattern friendly; No code required to use the control