Also a vary, VARY good link to free language packs. Swahili and Zulu amoust others.
I learned so much with this, I bought the delux package. It has a great audio programme that allows you to hear the words pronunciation at different speeds.

For a 'freebie' it's great!

http://www.byki.com/

I am a little peed off at the amount of 'coolie' words within swahili but hey, no language is an island.