Snyk - Snyk helps you use open source and stay secure. Continuously find and fix vulnerabilities for npm, Maven, NuGet, RubyGems, PyPI and much more.
Keygen - A dead-simple software licensing API built for developers
Dependabot - Automated dependency updates for your Ruby, Python, JavaScript, PHP, .NET, Go, Elixir, Rust, Java and Elm.
@ctivate - Activation Solutions is a software license management system solution to protect your software product from illegal copying or distribution.
Quick License Manager - Quick License Manager (QLM) is a license protection framework that creates professional and secure license keys to protect software against piracy.
Labs64 NetLicensing - Monetize your digital products and services