If you just want a simple way to pick gear for each slot I had made a web app d3buildplanner.appspot.com that lets you select skills/gear and stat and gear priorities. It's not very fancy looking, just a simple thing and possibly still has bugs. I had made it cause I was thinking up different builds and wanted basically a skill calculator that also let you pick gear.
It isn't updated with 2.0.5 skill changes since the game guide wasn't updated with them yet and I just download the tooltip data from the game guide. Here's a random example I just made up: http://d3buildplanner.appspot.com/#dhS11e53b43c44b32c42ecba9Gj18!z!!v15!!!k2i!!!t2a!!!a13!!!i17!!!725!!!41f!!!s2g!!!52d!!!11k!!!w1o!!!w1m!!!P!!!