Warren's Golf and Design
I love Warren's tutorials, truly a complete job of describing in detail the various design elements...check out his tutorials on rolling fairways, and downhill and uphill elevations using slopes... they are an instant classic. A superior job on course designs highlights this wonderful site.
Scott Antes Golf Course Design
A top notch site as well, his do's and dont's in course design is a must read. A small collection of tutorials, that you must see, as they enhance the creation of any course. He has created an advanced .ini file system that is well worth looking at. Course design is a " must see " and attention to detail also shows his love for the game.
Mike New Course Design
Mike has some great tutorials on golf course design, amongst them is a tutorial on real course conversion, and a overhead tutorial that will really spice up your presentation. I also like his custom objects area, it will help to give you an edge in the visuals, especially when your playing partner keeps seeing those hats. Solid designs are a wonderful addition here, and as with most of the top designers, the courses that he presents are sound. You should certainly look at another top-notch site !!!
The Design
Depot
Tremendous amount of custom objects at this site, and the artists are amongst the best for custom design. Horizons, sky's, flags, textures, and custom objects are the focus at this site. If you are looking for a specific object, start here.