We have integrated the free downloads into our site so you don't have to log in and purchase free downloads.
Call of Cthulhu
Under Call of Cthulhu menu we have the following:
The BRP Quick-start, character sheets and free adventures are here.
Under Organized Play, check out our GM Resources.
If there is a specific free item for a product, you can download it directly from the product page, like Cthulhu Invictus.