Company OPENLANGUAGE INC created these great apps:
OpenLanguage - Real Language Taught By Real People, 潘吉Jenny告诉你 · Learn English · 学习英语, Real Deal English, Learn Arabic · The Arab Street, Real Deal Spanish, English Placement Test, Spanish Placement Test, Real Deal French, Japanese Placement Test, Kana by OpenLanguage Japanese, 开言英语-成人学英语，地道口语练习, and others..
