As i am alone standing , indie game developer i often use some free graphic or music , here is the attribution page to thank all guys that support us with such great content.

background of this website
Designed by Kotkoa / Freepik

background music Crush The Ball
http://www.freesfx.co.uk

featured picture on all i see is code post
Designed by Freepik

featured picture on Still nothing, f*#@ post
Designed by Freepik

featured picture on Screaming from darkness post
Designed by Timmdesign