Originally Posted by Jetster
Try the Microsoft Comfort Curve Keyboard 2000. Its only $20 Has the low profile keys
I've used that keyboard before and while it is more quiet than the average keyboard, it is still audible. Maybe it's just my sense of hearing, but it's nowhere near silent to me. Maybe if you had some case fans to drown out some of the noise it wouldn't be audible. Also, that keyboard has horrid reliability issues.
If you have a non-clicky mechanical keyboard, adding some key dampeners might make it nearly silent.