jayanam writes:
There are new features added to the hard surface addon JMesh Tools for Blender 2.9 like improvements for booleans with mirror and arrays and convenience functions for symmetrize and the textbox.
The addon is also available now on the Blender Market - but don't worry it is still free and will always be for free - when you get it from the blender market you get special support and you also support the Blender devfund with it.