From SAPIEN Technologies:
PowerShell Studio is the feature complete PowerShell Integrated Scripting Environment (ISE) available. You can customize your panel layouts for the way YOU work or use one of several predefined layouts. Quickly change font size with a handy font size slider. Use our function explorer to rapidly navigate to any function, event or workflow. Change the name of a function or event and it will propagate throughout your script. Our Object browser quickly connects you with PowerShell cmdlets, .NET, WMI, databases or files. Use Snippets to instantly add predefined and tested script segments to your work. And work faster due to our performance enhancements and reduced load times.