- Source 1: user FOSSarts on FreeSound .
- Source 2 : SoundBible https://soundbible.com/ has some sound effects under Public Domain (CC0)
All Sound effects under User FOSSarts are Public Domain.
There will be more Public Domain sound effects to add. If any of you know a good alternative to FreeSound for uploading and sharing sound effects under public domain, let me know.
Also all of the photos under AshenOne are public domain.