Description: AnkiDroid is a free and open-source flashcard app for Android. It allows users to create decks of flashcards with text, images, audio, and video, and uses spaced repetition to optimize studying. AnkiDroid can help memorize anything from languages, to science material, to trivia.
Type: software
Pricing: Open Source
Description: Yahoo! Answers is a community-driven question-and-answer site where people post questions on any topic and other members of the community submit answers. It was launched by Yahoo! in 2005 as a way for people to ask and answer questions on a range of topics.
Type: software