The Hellenic American Union is offering free Modern Greek lessons in the form of podcasts. In total, 80 podcasts are available and you are able to download to your iPod or any other mp3 player you are using. You can test your Greek Level and improve your writing skills online.
Full transcript (in .pdf form) and audio file (in .mp3 form) of all podcasts can be accessed.
Listen to Greek online or download at: Greek Podcasts

Byki is a powerful and personalized free language-learning system and it’s available in over 70 languages. Learn different languages in a faster and better way. Finding good resources and sharing the learning with other users in the online community. It runs under Windows XP, Mac, PocketPC and Palm. The “Express” version is free and covers beginners level. This is a full learning methods that focused on the most commonly used vocabulary and common expressions. The method is based on flash card and help you to build your own vocabulary quickly.

You can give it a try at Byki.com

goonlinetv.com hosts a collection of links to more than 3000 free online TV channels worldwide. Just select a country and choose a channel to immerse yourself in your target language. Most of the channels require Windows Media Player (or a compatible player), some of them require RealPlayer.