AlternativeTo is a website which lists alternatives to web-based software, desktop computer software, and mobile apps. Free • 98 alternatives • 2719 likes
Wikipedia is a free, multilingual encyclopedia project supported by the non-profit Wikimedia Foundation. Wikipedia has 17 million articles (3. Free • 55 alternatives • 1448 likes
Content-agnostic flash card software that supports audio, images, and videos via LaTeX. Free • 152 alternatives • 444 likes