Keygen - A dead-simple software licensing API built for developers
WebCops - With more than 30 years of experience in copy-protection and encryption. Link Data is making protection for CD, DVD, USB and web on Windows, Mac and Linux.
@ctivate - Activation Solutions is a software license management system solution to protect your software product from illegal copying or distribution.
Bytes Software License - Leading provider of software licensing services and security services. Bytes solutions ensure businesses achieve maximum IT efficiency and security.
LicenseWatch - License Management
SLASCONE - SLASCONE is a Licensing as a Service solution for software and IoT vendors. SLASCONE helps vendors distribute, protect and monitor their products, with minimal engineering effort. In the cloud.