RBAC Manager R2 for Exchange 2010 SP2, Exchange 2013 Preview and Office 365
RBAC Manager puts all efforts to simplify the RBAC administration. Basically it provides the missing GUI to edit RBAC settings on Exchange 2010 systems; including adding/removing cmdlets, cmdlet properties, assignments etc. RBAC tool is written in C# and using Powershell behind the scenes
Source: http://rbac.codeplex.com/