I have no paid add-ons, there are plenty of free add-ons that ship with Blender they just need to be enabled.
They may not have all the bells and whistles of a paid add-on, but they do the job for me.
Here are a few of the included with Blender add-ons I use.
Add Mesh: Extra Objects
Add Curve: Extra Objects
Mesh: F2
Mesh: Edit Mesh Tools
Mesh: Loop Tools
Node: Node Wrangler
Object: Bool Tool
