From seemingly nowhere, the great Tekezo has released a new Gameboy / Gameboy Colour emulator with both sound and saving support!
Based on GnuBoys source, the following is supported in this release:

Implemented
– GB/GBC emulate with sound.
– save support (with long filename support)
– state save/load

Not yet
– smooth sound on some GBC games.
– frameskip.
– stable.
– source code cleanup.

As usual, we will have disk images available for you to download as soon as we can make some, but if you are extremely impatient you can go and grab the plain files binaries from Tekezo’s Site

You can discuss this in our forums HERE