The Instant Immersion series is the most effective program available for learning to speak a foreign language quickly. Based on the highly effective Euro Method (an intuitive approach that surrounds you with native speakers and a new culture), this program provides authentic dialogue and traditional settings that immerse you in the French language and lifestyle. You will quickly move from basic speaking to an intermediate level with easy-to-follow activities on pronunciation, vocabulary, grammar, sentence formation, and listening.
Second set of German language CDs I've tried - this goes much more deeply into verbs and noun genders and grammatical cases. Will need to listen again in order to really digest the grammatical cases (accusative, dative, etc.). I felt this could have been much more effective if paired with a workbook BUT I couldn't have gotten this far at home with nighttime reading - the great majority of my meaty reading is done via audiobooks during my commute. Still, it got me a lot farther with beginning German!