The JXLoginDialog component is part of the SwingX (https://swingx.dev.java.net). It provides useful capabilities like authentication, error handling and support to store passwords in a secure manner.

SyntheticaAddons provides the LoginPanel-UI for every available Synthetica Look and Feel. The UI configuration can be made via UI-defaults and is part of the synth.xml file which belongs to every Synthetica Look and Feel V2.0 or above.