1.  IngoLingo - Home & Education

Ingolingo is a vocabulary builder that works either as a stand alone program or as an addition to other language courses. It teaches words and sentence comprehension using different new methods to make the process very fast. Ingolingo teaches you words in the order of their popularity and uses intelligent repetition to expose you to the words more often. In test cases, people knew more than 500 words in less than a month. Ingolingo really speeds things up. Try it, it's quick and painless.