Paper.li provides a forum for students to find TL newspaper articles and publish an online class newspaper. This could be used with upper-level students to expose them to news and authentic language materials, and allow them to create based on their interests.
I included this web-page because it mentions a Twitter group I like to check out called #langchat. It also archives chat sessions. Lots of practical-in-the-classroom idea sharing, especially regarding assessments.
Duolingo is a free language-learning website and crowd-sourced text translation platform. The service is designed so that, as users progress through the lessons, they simultaneously help to translate websites and other documents.
It is a way that teachers can provide an additional language learning source to their students, and once each lesson is completed, students read authentic sources and complete activities on the Internet from authentic web-based sources.
This interactive website is a great classroom tool for authentic, age appropriate readings. It is set up like an average news website, which offers students information on a broad range of topics. In addition, there is a teaching corner that offers free resources and topics for debate!
Create a free account on this French language website so you have access to all the great videos, articles and "dossiers". For example, there's a one minute animated video that explains why we have the 1 hour time change this weekend. Great for high school level French students.
This site has hundreds of short, authentic audio clips (in French as well as in other languages) that teachers could have their students listen to. Entries are tagged according to CEFR (Common European Framework of Reference for Languages) level, theme, duration, voice, etc.
This very whimsical, yet well-organized and engaging website offers a variety of activities for learning Spanish. Zachary Jones uses songs, videos, graphics, and articles to make the learning process authentic and enjoyable. One also can follow Zachary Jones on Twitter to receive Vocabulary of the Day on @ZJonesSpanish
This site has thematic French vocabulary exercises that include authentic audio for topics such as the body, animals, the family, clothing, the train station, in the city, etc. It could be assigned for homework so that students can listen to the audio as many times as they like, or it could be projected on a screen for classroom use.