You can use FinancialForce Foundations to connect FinancialForce applications so they can share information. For example, you can configure Human Capital Management (HCM) to publish information to Foundations, which then passes the information to subscribing applications, such as Professional Services Automation (PSA).
You can also use Foundations to connect third-party applications to FinancialForce applications. For example, you can use a FinancialForce REST API to send information from a third-party HCM application to Foundations, which then passes information to a subscribing FinancialForce application.