Powershell GUI IDE RAD editor

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PowerShell Editor Roundup: Who's the Winner?
(cache: http://www.webcitation.org/5tLsyzgv5)

• Quest PowerGUI (http://www.powergui.org / http://www.quest.com/powershell/)
• Sapien PrimalForms OR PrimalScript (http://www.sapien.com/)
• Idera PowerShell Plus (http://www.idera.com/products/powershell/) 
• Microsoft Windows PowerShell ISE (http://msdn.microsoft.com/en-us/library/dd367962(VS.85).aspx / http://technet.microsoft.com/en-us/library/dd315244.aspx)