There isuseful sites on the Internet, including sites for watching videos and learning and other cultural and sports site and many other fields …

Here are the best sites on the internet that you should know which will benefit you in your electronic life very much and which are the best useful sites on the Internet.
IFIXIT It site sells repair parts and publishes free online repair guides similar to wikis for electronics and smart devices
ZAMZAR  IT allows users to convert files without downloading a software tool, and supports more than 1200 different conversion types
alternativeto   website that lists alternatives to web-based software, desktop software, and mobile applications, and sorts alternatives according to different criteria,