License4J Floating License Servers.
Floating License Server runs as a service on Windows XP, Windows 7, Windows Server 2003 and Windows Server 2008. Since it is Java based it runs on Linux and UNIX operating systems.
License4J Floating License Server serves floating licenses created by LICENSE4J License manager. Floating License Server has an installer for Windows, Linux UNIX version is not an installer file but it is enough to decompress and run a simple script on Linux UNIX. Floating License Server includes two components: licenser server itself and a manager GUI tool.