Audio and Video

Audio lessons:
Clear Chinese:
Popup Chinese: the podcasts are available on the website free of charge.
Chinese iLab

Video lessons:
Yoyochinese: after a free registration you gain access to demo video lessons, which are presented nicely and are easy to follow and remember. 
(! You will be getting regular emails from them unless you unsubscribe from the mailing list)
If you want to watch some of the videos, you can also go to their Youtube channel.

Chinese iLab
Fluent U: Study Chinese with real world video content. 15 day free trial.