I spend a lot of time messing with presets in windlight, and feel it would be nice to share ^_^
So, I've uploaded a zip file to Rapidshare, that contains 17 skies and 6 waters, for all to use. I will be uploading more and posting replies to this thread with links, I'm just planning some 'sets' to match.
Some of the waters and skies are meant to be used together.. pretty easy to figure out, same name

Download link::
http://rapidshare.com/files/83608954/Okiphia_Rayna_-_Windlight_Presets.zip.html
To use: Open zipped file. Inside are two folders. Custom Water, and Custom Skies. Feel free to unzip these to somewhere easy to find. Next, copy the files from inside the skies folder, to the windlight skies directory.
Copy the water files into the windlight water directory.
For windows, the most common path will be::
C:\program files\SecondLifeWindlight\app_settings\windlight\
With the skies, water, and days folders inside.
I have not added any full day presets to this zip file.
Hope you enjoy!