chippwalters makes some really good tools and material packages. Here's the link:
http://www.altuit.com/webs/hemingway/AltuitCover/default.htm
I wouldn't say they are "must" for the average user but, depending on your needs, it may be.

There are others really good material packages, like SeaVue or "Postcard from the Rim" and others from monsoon, for sale in 3DCommune (http://www.3dcommune.com/3d/store/display.mv?vs_mons_vuemt)

But if you're using Vue for a short time, you probably have still a lot to explore. I would recommend you to explore it deeper before you go to other stuff. I've been using Vue intensively for little over one year, I made 200 images and I still find new stuff inside of Vue everyday... :-)