@ctivate - Activation Solutions is a software license management system solution to protect your software product from illegal copying or distribution.
Open iT LicenseAnalyzer - Open iT LicenseAnalyzer is a software usage metering and optimization tool that provides an enterprise-wide overview of installed software programs managed by most software license managers.
Keygen - A dead-simple software licensing API built for developers
Vector Vizor Software - Vizor Software manages the entire software estate, including on-premise PC software licenses, mobile app purchases and cloud service subscriptions.
LicenseWatch - License Management
Black Duck Hub - Black Duck Hub open source management helps security and development teams identify and eliminate open source security risks.