Digital Language School is not just website, it's a whole learning environment. It's better to think of a virtual building with people inside. Like in a real school, in a digital langschool, we have students & teachers, classrooms, textbooks, study plans, tests (exams) and study results. All study materials are already prepared.
Intermediate courses of vocational English, German, Spanish and Italian are available already in 13 languages: English, German, Czech, Slovak, Norwegian, Spanish, Italian, Hungarian, Polish, Portuguese, French and Romanian, Turkish. Beginner language courses for English, German, Spanish and Italian should be available during 2010.
Digital textbooks are only one of the parts of the digital LangSchool course, they are however also useful separately and freely available under the terms of the GNU GPL. Find them here