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 3 versions: Standard, Standard Plus and Pro.
Get Standard for free. It's for hobbyists and students, not for commercial use. No Tech Support. No Extra Brushes or Custom Gizmo. Standard stops at version 1.5 so think of it as a "try before you buy" sample.
Get Standard Plus for $5. It gives you the latest version of Ryan's Tools for non-professionals. Not for commercial use. No extras.
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. 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.
After purchase, download the version of Ryan's Tools for your version of Zbrush:
version 2.0 works in Zbrush 2021 and all subsequent versions
version 1.5 Works in Zbrush 2020
version 1.3 Works in Zbrush 2019
If you want to use the plugin in version 2018, you're stuck with version 1.2
Version history with video demos:
Version 1.1 added a few more features which you can learn about here: https://youtu.be/uKxqDrXcD14
Version 1.2 gives you some nice new superpowers :) learn more here: https://youtu.be/YBXx5dXbgnU
Version 1.3: https://youtu.be/8Cp4LjZK8iI
Version 1.4. Bug fixes galore and a few handy new bonus features: https://youtu.be/MCzLsN4Ch4c
Version 1.5. Really exciting advancements to behold https://youtu.be/6rH8qX7jKBk
Latest version: Ryan's Tools 2.0 https://youtu.be/NG8uHA74YPs