I would add Telerik what MS used for office, IIRC. I donβt know if they passed WPF, but they have a good track record. I am also a fan of DevExpress and their support is great, but the wpf grid is still in beta. However, ordinary. Both of them pay, though, but are worth it.
I never found a good loose mesh. Guess that they are too hard to write. With what ... funny ... wpf, I doubt that someday there will be a good free one.
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