The Apps list is categorized by your list of apps, and published apps by topic, operation, or HPC, as described in Using Apps.
If an app name is not returned in a search, the app may have been deprecated. You may want to search for a similar app or contact the integrator to see if there is a suitable alternative or a possibility of unarchiving the app. If you are the app integrator and want to unarchive an app, contact Support for assistance.
If you haven't yet authenticated to the HPC server, HPC apps will not be returned in search results. To do so, click the HPC tab to receive the prompt and then authenticate, or close and reopen the DE to receive the prompt and log in to the Agave server.