Keygen - A dead-simple software licensing API built for developers
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.
10Duke Enterprise - Powerful cloud-based licensing solution designed for fast-growing software businesses looking to scale up software licensing & minimize friction.
wyDay LimeLM - Use LimeLM to add hardware-locked licensing, online activation, and timed trials to your app.
VMProtect - VMProtect Ultimate - All-In-One Solution For Software Licensing And Protection.