The package includes ball and spoke (also known as, ball and stick) models of various molecules/crystals designed using PGF/TikZ. I am still in the process of adding more figures & models.
You are free to edit and use it under the LPPL license agreement. If you are interested in contributing to this package, clone the repository edit it and send me an email with the patch.
Since this package is still in its alpha stage, I will upload it to the ctan repository only when it has a substantial amount of ballandspoke models included.