Books+Cassettes+CDs+Videos+Online, No Pronunciation Scores, Cheap, ★★★
They have thorough books (in English) on 40 Indian languages, briefer looks at others, and audio, video, online material for some of the major ones.
The major books have 600-900 pages. Each lesson has dialog, drills, exercises, vocabulary and grammar. They explain some of the culture. The cultural explanations are written for Indians who may already know some aspects of these other cultures in their country. These are a major resource for all the languages they cover. (Click for Arguelles' review.)