This is the Blender download page : Download — blender.org
Blender will remain free.
On Gumroad and Blendermarket you can find some very useful plugins for Blender and some are free while others quite cheap. For enhancing sculpting, rigging and UV packing capabilities and speedup working with Blender.
Blender 2.80 UI is a huge improvement over the messed up UI Blender really had until that. You might want to check the free Blender fork Bforartits too: https://www.bforartists.de/ which aims at creating a way better UI for Blender.
Another useful free 3D modelling software is Rocket3F Basic (the Pro version is not free) which is fully working but you can’t customize UI and tools : https://www.rocket3f.com/
Also for PBR painting there is a very cheap software ArmorPaint you can buy on Gumroad (the opensource github release is lacking optimizations and features) https://armorpaint.org/