Description: Brilliant.org is an online platform that offers math and science problems and courses to help people improve their logical reasoning and problem-solving abilities. It uses interactive quizzes and puzzles to make STEM subjects more engaging.
Type: software
Description: HTML2PDF is an open-source PHP class that allows you to generate PDF files from HTML code. It supports HTML5 and CSS3, is lightweight, and can handle complex layouts and Unicode.
Type: software
Pricing: Open Source