StudyX

Episoden is a live video chat platform for real-time English conversation. Connect with global partners in 7-minute sessions using fresh daily topics. Free to use on web and mobile—ideal for building fluency, confidence, and cultural exchange.

Perplexity is a free AI-powered answer engine that provides accurate, trusted, and real-time answers to any question.

bdebooks.com offers abundant free eBook resources, supporting search and download of books across literature, education, technology, and more. Get high-quality eBooks without registration, with mobile-friendly reading, making it an ideal choice for students and book lovers. Experience convenient reading now!

PhET Interactive Simulations offers 150+ free interactive science simulations covering physics, chemistry, biology, and more, helping students intuitively understand principles and teachers easily prepare and teach lessons. Experience lively and engaging science experiments now!