Sound Effects

Image from: www.openclipart.org/search/?query=music&page=9
Whether working on a digital story, creating a podcast, or making a radio play, these resources provide a variety of unique sound effects:

Freesound- A database of Creative Commons sounds.
Soundjay- Free sound effects including human, domestic, machine, nature, and transportation sound effects.
Mysoundfx- quality free sound effects.
PartnersinRhyme- Free music loops and sound effects
Sounds- Free sound effect library.

Soungle- A simple search engine for finding sounds.  

Findsounds - Another great sound search engine.