Keygen - A dead-simple software licensing API built for developers
wyDay LimeLM - Use LimeLM to add hardware-locked licensing, online activation, and timed trials to your app.
Labs64 NetLicensing - Monetize your digital products and services
Quick License Manager - Quick License Manager (QLM) is a license protection framework that creates professional and secure license keys to protect software against piracy.
Bytes Software License - Leading provider of software licensing services and security services. Bytes solutions ensure businesses achieve maximum IT efficiency and security.
Open License Manager - Open License Manager is a software protection, copy prevention open source sdk, that allows you to easily add a license to your software.