Use apps (previously known as "integrations") to connect your Lokalise project to other popular tools or your internal flows. You can access this feature by navigating to Apps in the main menu.

Also on the projects page you'll see a list of installed apps for every project:

There are several types of apps available that can be found in the corresponding collection. You may also be interested in learning about Lokalise Messages for various apps including Intercom and Zendesk chat.