Freesound.org is a wonderful place for young/poor filmmakers like me. You can find so many amazing audio files available for free download. It's fantastic. If you're looking for foley, ambient sounds, specific sound effects, or other bleeps, boops, or booms this is a great source for free sounds.
Free Audio Clips for Download
But a few days ago I went looking for some sound effects and the ones I found were all Creative Commons Attribution. I firmly believe people should be given credit--and payment--for their work if they want it. But it can be a pain to attribute tiny media files you use in your productions. I don't like the hassle. I far prefer public domain/royalty-free media. And since I've long wanted to provide more royalty-free media for you to use in your productions, I've started uploading audio clips I've recorded as public domain. In a nutshell: You can use the sound effects uploaded to the Production-Now.com freesound account for whatever you want. The files are there for you to use. [Granted, I do appreciate a shout-out if you do use them. Tell your friends about freesound too!]
I'm certainly no audio expert, but as I create sounds for my productions I'll share them with you.
If you have any sounds you need, let me know and I'll see what I can do. I'd love to have a huge collection of free, public domain sound effects for you to use.
Your Media Production Mentor