Nik Color Efex Pro 4 has like 52 filters
One of them being a polarizer filter
It will boost the blue in the sky and can be applied after the fact of shooting, should you have forgotten your filter at home.
The glare in the water, that’s reduced by the actual polarizing filter attached on camera; is really the best way to cut the glare from water, not this filter.
If you want to boost the sky and enrich the color, try this filter.
Rick De Paiva