OnTopReplica is licensed under the Microsoft Reciprocal License (Ms-RL).
The original source code can be found on the project's homepage on CodePlex.
OnTopReplica was inspired by Switcher and other DWM based applications.
All Vista controls are part of the WindowsFormsAero library for .NET.
Some example code taken from Ookii on Channel9.
NativeToolstripRenderer class taken from asztal.net.
Some icons from VistaICO.com and the Xiao icon set.