FreeSFX is a place to visit if you need cool free sound effects for your project. Licensed under Creative Commons and available for commercial use too. You can also upload your own sounds to the library. Neat.
Are the sound effects on freeSFX.co.uk really free? The short answer is yes! All the sound effects available for download on freeSFX are uploaded by the owners of the sounds who have granted permission for them to be downloaded and used.