There's a "Download" button for their open models literally two clicks away from the homepage.
Click "Learn more" under the big "Committing to open models" heading on the homepage. Then, because their deeplinking is bad, click "Open" in the toggle at the top. There's your download link.
See “no longer” in my original comment. They just announced their new slate of models, none of which are open weights. The models linked to download are the “before Microsoft $$$, Azure deal, and free supercomputers” ones.
Sorry, they’ve just scrubbed most of the references and otherwise edited their site to downplay any commitment to open source, post-Microsoft investment.