Hello all. I have a program that can make sound effects and ambient sounds, royalty free. It is called Atmosphere Deluxe. I can make wind, rain, nature sounds, storms, birds, animals, insects and things like that. This program is pretty old, around 2003 but it works well. Obviously people sounds such as cars, trains, and ships, would not be appropriate at this point but who knows what the future holds. The sound effects are pretty customizable, such as deleting certain sounds and adding others, as well as a volume control on each individual sound. I have other types of sounds that I have recorded myself, such as elevator sounds and machinery, and these can be altered if needed.
If any of you need something like this, please let me know.