Language.
Culture.
Life.
Parlo is a free language and culture website, that has online courses for those of us who want to learn a new language or brush up on one we already know.
The features that I've used are their online courses, tailored to your learning level, and their daily email updates. They also have a broad range of cultural resources, to better immerse one in the culture of one's choice, but I've yet to avail myself of these.
Hopefully, by reading these emails every day, I'll keep my Spanish skills from draining away entirely, and won't make an ugly American of myself when I visit Spain.
http://www.parlo.com