AnkiDroid
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
Macmillian Dictionary and Thesaurus
Description: Macmillian Dictionary and Thesaurus is an online dictionary and thesaurus resource providing definitions, synonyms, antonyms, and word origins. It has over 350,000 words and phrases with audio pronunciation.
Type: software