Labs64 NetLicensing - Monetize your digital products and services
LM-X License Manager - LM-X License Manager
ElecKey - ElecKey is the complete solution for software copy protection, software licensing, and secure software distribution. ElecKey provides software security that helps to protect your software applications against piracy.
LockBytes - LockBytes is a Lightweight DRM (Digital Rights Management) solution for licencing Windows executable files.
LicenseSpot - License Spot is a complete, easy to use and integrate License Manager/activation tool for low cost.
PELock - Software copy protection against reverse engineering with anti-cracking & anti-debugging techniques. Software license key system with time trial options.