Great database here. But it doesn't ALWAYS cover all of my needs.
Where else can I go to find sounds? What are the best "royalty" or "pay to download" sound databases?
If you don't mind paying, "http://www.istockphoto.com/audio" have great quality control on incoming sounds.
For (open source) game development: OpenGameArt.
AudioJungle is another paid one.
Googling for cheap royalty free sound effects should give most results.
Just heard about this but don't know anything personally. A professional sound editor I know said it was pretty good.