For the Gif I use this free very small & simple but very cool GifCam
http://blog.bahraniapps.com/gifcam/

SimLab Composer Lite is Free (Maxi 1920 * 1040)
Sufficient for Still images for Internet! Can be used commercially!
https://www.simlab-soft.com/3d-products/simlab-composer-lite.aspx

...seems BreakDown for the moment !

but you can take a look to my French one! ;)

https://simlabfr.weebly.com/light.html

Else a very cool one (even free if you have donwloaded previous free version 2019)
is TwinMotion 2020
Interface truely easy and remarquable possibilies!
Even new simple animations (Translation & rotation) of objects!