"Until March 11th, 2014 (the launch of Add-ons) Apps Scripts for Google Sheets were distributed in the "Script Gallery." The tools below will remain useful for some time to come, as many of them perform functionality still not available - most specifically TRIGGERED EVENTS like form submit or time-based events. Until the Add-ons framework supports triggers, we encourage users to choose when and where to use the OLD Google Sheets so they can continue to access the script gallery and use our legacy tools. Use this link to launch yourself a copy of an "old" Google Sheet, where you will be able to access the script gallery. "