http://www.3dcommune.com/ - search the Vue free items and make sure to get Monsoon's Island - it's a whole Vue scene loaded with textures.

http://www.cornucopia3d.com/ - Best store for Vue items - there are some free items too, they are a bit hidden, so do a search on Free.  Search button is waaaay down on the lower left corner.  It searches both the forums and store.

http://www.incrediblylush.com/ - Linda has some great freebies.  She sells the Lush plants at Cornucopia.  These are some of the greatest plants available. 

Don't forget to look through the forums - there are lots of free items scattered throughout...

LVS - Where Learning is Fun!  
http://www.lvsonline.com/index.html