Audiobox allows you to mix little sounds like that of birds, metals, concrete, flesh, and many more, with extra options like:
(1)change volume
(2)change pitch
(3)decide if the audio repeats

As of February 2021, it includes audios of:
(1) animals like, birds, dogs, insects, cow, etc.
(2) impact and breaking of surfaces like glass, plastic, metal, concrete, etc.
(3) energy fields, guns and flesh
(4) environment like, waterfall, water splash, tree, etc

Hope you enjoy the mixing!