Expression Toolbox created by Chris Roe available from aescritps, is The Toolbox is a centralized location for you to store commonly used expressions, as well as making it easy to apply and retrofit to the comp you’re currently working on. You can group expressions that require multiple properties and controls to be enabled. License Price is $20 and there is a free download which is the full version of the script which is fully functional without a license for 2 weeks.