YouTube Downloader

An open-source mathematics textbook project dedicated to promoting educational equity, offering PDF resources from primary school to university levels. It features automated merging of split PDF files, serving families and students worldwide.

DataTool.vip is a powerful free online video downloader supporting over 40 platforms including TikTok, Instagram, YouTube, and Twitter. It offers 4K resolution downloads, watermark removal, and fast processing. No software installation required - simply paste a video link to download.

Convert YouTube videos to MP3 files in seconds with AISEO YouTube Audio Downloader. Enjoy free, high-quality YouTube music without ads, watermarks, or registration.

A platform centered on book recommendation and display, covering diverse reading needs and targeting a wide range of audiences including students, literature lovers, social science researchers, and people seeking self-improvement.