Jael Paris recently discovered several years of Elle Girl archives available free on Google Books. The issues are fun to flip through, especially the early ones which remind me of the style I wore in high school (funny memories).
While that appears to be the only fashion magazine available, there are several others that offer plenty of design and fashion inspiration. My favorite is Liberty Magazine, which features plenty of vintage ads and fashions. I especially love the 1976 "Then & Now" issue (pictured).