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: Debuggex is a free online visual regex tester. It allows you to visually construct regex patterns and test them against input strings to see if there is a match.
Type: software
Pricing: Free