A simple (hopefully nice) GUI for rioutil (s. rioutil project at sourceforge.net). Communication with the players is done by rioutil. JRio is only approved to work with the Rio Chiba but is likely to work with other players supported by rioutil, too.
JuMP3 is a Java application that streams MP3 and Ogg Vorbis audio files from a server to a player on a local network. Both are controlled by a separate controller with a GUI based on SWT.
JRioGui is intented to be a full featured GUI allowing to upload/download directories and files on a Diamond Rio500 Mp3 player. It is written entirely in Java but depends on the rio500 utilities (http://rio500.sourceforge.net).
Unlimited organizations, 3 enterprise SSO connections, role-based access control, and pro MFA included. Dev and prod tenants out of the box.
Auth0's B2B Essentials plan gives you everything you need to ship secure multi-tenant apps. Unlimited orgs, enterprise SSO, RBAC, audit log streaming, and higher auth and API limits included. Add on M2M tokens, enterprise MFA, or additional SSO connections as you scale.