The app services available in the Mendix Marketplace are packages of preconfigured business capabilities provided as modules containing logic (microflows and nanoflows), UIs, workflows (activities), connectors, and APIs. As flexible building blocks that include out-of-the-box integration into the Mendix development experience, Mendix app services are designed to solve discrete business problems within the context of larger solutions.
When you download an app service, it will go into the App > Marketplace modules folder.
App services like 3D Viewer start with a free trial for development and testing. After the trial ends, a subscription is required to continue using the app service.
For details on participating in the Mendix Vendor program, see How to Sell Your App Service in the Marketplace.