https://www.fab.com/megascans-free

Edit:

• added direct link to the store page

Shoutouts

Thanks to the following commenters below for additional recommendations that I added to this post!

• bruhduh
• Toes

Free Open Source Alternatives

[Visual/Graphical]

For all visual/graphical artists I would personally recommend switching from Photoshop over to

• KDE's Krita
  • Licensed under: GPLv-3.0 or later
  • Flathub

• GIMP
  • Licensed under: GPLv-3.0 or later
  • Flathub

[Audio]

For audio migration I'd recommend switching from Soundbooth to

• Tenacity
  • Licensed under: GPLv-2.0 or later
  • [Flathub](ht