Between them, the 5 license management software on this page cover portable license (4). 5 of them have written a profile you can read before you get in touch.
License Manager, from License4J, is a toolkit for licensing Java software products. It covers creating licence keys and checking them inside a Java application.
KEYZY is a cloud service for licensing software. Small and medium-sized vendors use it to generate, store and deliver licences without running their own servers.
The order is earned on evidence: client reviews, vetting, awards and the facts a business states on its own website, which we read and date. Nobody can pay to move up. Add reviews or verified facts to your free profile to move up at the next edition; there are two ways to stand out now, and each one says what it is.