Simply go to the Freeware page from the shop: and click one of the two options:
Chemical Resources – Periodic Table, etc., (PC and Mac)
Multimedia – All LMS Animations (PC ONLY), but will work on Mac using WINE (Wine Is Not a windows Emulator) – see blog about using WINE.
Click on the program you want, proceed to checkout with no charge, download and unzip.
For the Chemical Resources: click the .html file to launch
For LMS Multimedia, PC users, download file, unzip and click any .exe file in the folder.
For Mac users: you must first install WINE. See Blog on this.