Slipscript is a module you'll love to hate. (Or hate to love?) It allows for the execution of arbitrary PHP scripts at URL's defined through the administrative interface. It is probably not dangerous but for now it will install into your system in a module group called "POTENTIALLY DANGEROUS CODE" just to be safe while the community weighs in on this idea.
This is a module that provides a Panels plugin UI for embedding forms for properly configured Entities. This allows users to provide entity add/edit/delete forms inside of Page Manager pages, and to control the visibility and labelling of both Entity Properties as well as Fields. The ability to control Properties (aka meta-data) in the UI is the key advantage provided by EPF. Token support is another useful