I (significantly) restored Palm/HP's webOS services, include the SDK, (partial) App Catalog, and a variety of proxied, re-created back-end services to keep devices like the Palm Pre and HP Touchpad functional:
https://www.webosarchive.org
https://appcatalog.webosarchive.org/app/TowerWarsHD
https://www.extremetech.com/mobile/141855-open-webos-can-now... https://www.cnet.com/tech/mobile/webos-running-as-an-android...