Component Factory has released The Krypton Toolkit - free for commercial use.

The Windows forms user interface toolkit targets .NET Framework 2.0/VS 2005 and includes:
     Krypton Button
     Krypton Group
     Krypton Header
     Krypton HeaderGroup
     Krypton SplitContainer
     Krypton Panel
     Krypton Label

Download it here.

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