Chromates are a source of chromium for electroplating steel, and are also used to make stainless steel. The most popular is crocoite which forms bright, attractive crystals of red, yellow and orange. Unlike tarapacaite and lopezite, crocoite is not soluble in water.
Tungstates and molybdates are always associated. They are important to industry as filaments in bulbs and tubes, and useful in nuclear reactors, to clad fuel rods. There are three main groups: wolframite, scheelite, and wulfenite. The only one that I am personally familiar with as a mineral is wulfenite.
I am finished with mineralogy for a long while.