They are for sale at a relatively reasonable price. Anfy 3D renderer which its author claims is the best on the net. The applets are sold as a package at a very reasonable price as it is cheaper than selling one applet at a time. Interestingly enough this search did not yield significant results. Not exhaustive but extensive.
Quality varies but most are extremely well done.
A must see site. The site is very fast loading and well organized. This is a must see site. Must see and bookmark site. ET Applets - Another excellent Swedish site containing a small number of applets.