I found the following tool, developed by Microsoft team; it is very useful if you want to build SharePoint 2010 PowerShell commands for the following products:
· SharePoint Foundation 2010
· SharePoint Server 2010
· Office 365
You can access this tool by the following link: PowerShell GUI tool
The Windows PowerShell Command Builder for Microsoft SharePoint 2010 Products and Microsoft Office 365 is a Silverlight 4 application that is designed to help IT professionals and power users learn how to use Windows PowerShell for administrative tasks.
Windows PowerShell Command Builder Getting Started Guide