Google launches native add-ons for Gmail
Earlier this year, Google announced it would allow add-ons for Gmail, and the time has finally come. Launching today, add-ons will allow third-party developers to integrate their services with Gmail directly. The first partners include Asana, Trello, DialPad, Intuit QuickBooks, and Wrike. A DocuSign add-on is coming soon, which should be pretty helpful.
See http://bit.ly/2ha5EyS where there is also a link to the marketplace where you can install the add-ons.