If you haven't already heard of this, it has a new beta update to version 10 and its fantastic. Sun ray scattering, reflective water with currents, warm, bright torches (this was a problem with the older versions) and more.

Here is the thread to install V8:
http://www.minecraftforum.net/topic/...-shadows-more/

You will need to manually install the beta. Check out his facebook for help:
http://www.facebook.com/SonicEther

Heres an image of what it can do:


Got any cool pictures of this mod yourself? Feel free to post!  

http://cdn.planetminecraft.com/files/resource_media/screenshot/1109/title_9643_screenshot.jpg (Unsupported image host)Tried installing it earlier on, it just gave me a blank screen whenever I started the game so I had to reinstall minecraft. oh and found this image on google