https://ryankittleson.gumroad.com/l/ryanstools

• Over the years, I have streamlined my workflow and flattened out speed bumps in Zbrush with custom tools. Now they're available to everyone! Ryan's Tools comes in 4 price tiers:
• Get Trial for free. It's for hobbyists and students, not for commercial use. No Tech Support. No Extra Brushes or Custom Gizmo. Standard doesn't include most newer features. Think of it as a "try before you buy" sample.
• Get Hobbyist for $5. It gives you the latest version of Ryan's Tools for non-professionals. Not for commercial use. No extras. Upgrades will require re-purchase every few years.
• Get Pro for $20. It also comes with my custom Gizmo, custom materials and lots of my custom brushes. Additionally, it comes with tech support if you have trouble. Free upgrades for life! If you have already bought it, simply find your email receipt and follow the download link which will give you access to the new version at no additional charge.
• Get Enterprise if you're an organization making over $1 million USD per year. $100. otherwise it's the same as Pro.