Came across this on discord and though it would be useful to share. Free tools are a huge help when starting out. They can also help you get to the point of commissions and crowd funding where you can roll that money back into your craft by purchasing the more commonly used / extensive tools.
These days Blender is a powerhouse in the realm of free software. You can box model, which is great for starting out and rapid prototyping. You can paint directly on models, sculpt with a similar workflow to Z brush, animate instead of Maya, video production as an alternative to Premiere, simulate particles and physics in place or Houdini. Do post-processing, VR, 2d animation and on and on.
Here are a few other highlights from the list
A couple that didn't make this list that I use frequently are Handbrake for nearly lossless video compression, Fastone Image Viewer for basic image editing like cropping, resizing and image management and Honeyview for single and bulk image converting.