The US Foreign Service Institute lessons are in public domain, and available for download on this website. Includes PDFs of textbooks and mp3s of audio lessons for several languages.
LiveMocha – an online project similar to the popular Rosetta Stone software, LiveMocha has some free (and some paid) modules for hundreds of languages. Sign up is free, and you have the option to connect with Facebook Connect.
Babbel.com – another project similar to Rosetta Stone software, Babbel is a subscription service that allows you to connect to other users while learning at your own pace.
You can also find free language resources gathered on this site, but they may not be very current or useful. You may also want to check with your local public library – many in the Richmond area subscribe to Mango.
See also: ReadWriteWeb’s 20 Ways to Learn a Language Online
Hey, great resource, thanks!