Circular Array is a Blender add-on for creating radial and circular arrays. Blender can produce this kind of arrangement using the Array modifier together with helper objects and drivers, and this add-on sets all of that up for you in a single click while managing the dependencies and hierarchy behind the scenes.
Alongside the core setup, the add-on introduces some extra functionality, though the developer describes its main purpose as saving time rather than adding features. It confirms the tool should work in Blender 3.0 and asks users to report any bugs they run into.
Circular Array is released under the GPL license and is listed as free here. The developer also offers it on GitHub, framing a store purchase as a way to support the developer and Blender. Documentation is included, and a short demo video is available for reference.