I understand you're looking for a "ZBrush Ring Builder 5 free download link," but I need to stop and clarify something important before proceeding.
This version is a significant upgrade for jewelry designers, including: Updated Assets zbrush ring builder 5 free download link
If you aren't ready to invest in a dedicated builder, you can use these built-in ZBrush features to create rings: RingBasic Primitive I understand you're looking for a "ZBrush Ring
Searching for "free" versions of paid ZBrush plugins often leads to: Malware Risks zbrush ring builder 5 free download link
FlippedNormals: Carries versions of the ZRing Builder suite. Key Features of Version 5