Simply Learn Languages - A phrasebook of 50+ languages for traveling (with audio)
Anki - Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.
Kommit - Flashcards / Spaced Repetition System with text-to-speech
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
LearnObit - A tool for your learning, like Anki & Workflowy in one
RemNote - All-in-One Tool For Thinking & Learning