Description: Mathcha is an open-source math equation editor and renderer that allows you to create beautifully formatted mathematical equations and formulas for websites, documents, presentations, and more.
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