There are a lot of sites you can sell your stock music on. More than I have listed yet on this blog posting. I compiled a list of 32 sites where you can sell your music as royalty free to make extra cash or maybe make a living at selling stock music. When making this list I was mostly concerned with whether the music library has exclusive and/or non-exclusive memberships, what percentage they paid to the artist as well as if they recognized PRO (performance rights organizations). Some sites had clear easy to find information while others were baren of information and a couple appeared to be private, as in producing music internally and not taking artist submissions.
A few libraries will not accept you if you already are selling in specific sites. Rumblefish was mentioned more than once, as well was AudioJungle. From what I gather the reasoning is becasue these sites sell the tracks for much less money. Also there appears to be a problem with some sites adding your content to the YouTube Content ID program, which flags customer's uploads cuasing headaches for everyone, and hence some libraries won't work with you if you submit to libraries who practice this behavior.
The list below is sorted in alphabetical order. I will add to this list more sites as I come across them. Read more