Bring a little extra to Google Docs and Sheets

Bring a little something extra to Docs and Sheets with add-ons Posted: 11 Mar 2014 01:59 PM PDT Today we're launching add-ons—new tools created by developer partners that give you even more features in your documents and spreadsheets. To browse through add-ons for Docs and Sheets, select Get add-ons in the Add-ons menu of any open document or spreadsheet. Once you install an add-on it will become available across all of your documents or spreadsheets and you can start using it right away. Note that add-ons for spreadsheets are only available in the new Google Sheets.

http://googleenterprise.blogspot.com/2014/03/bring-little-something-extra-to-docs.html