Workato offers multiple integration apps installable through multiple platforms such as the Salesforce AppExchange or Infusionsoft Marketplace. In order to uninstall your integration apps, you would need to click on the "Apps" tab as seen below, and click on the app you wish to uninstall.
Append the "/uninstall?deep=true" (without the double quotation mark) to the back of the link which you are redirected to after the above step. (if there is a pound sign (#) in your link, remove the text after the pound sign, including the pound sign, then add in the command.)
Do note that uninstalling the integration apps would also uninstall all their related recipes, and this process cannot be undone.