There are additional third-party services that can be added into a Sitecore platform. These can be integrated through Sitecore Connectors. Some products that can be downloaded via the Sitecore Downloads Centre are:
· Sitecore Commerce Connect
· Sitecore Connect for Salesforce
· Microsoft Dynamics 365 for Retail and Sales
Learn more on Sitecore integration and how to install Sitecore Connectors.