Hardware Test 
hardwaretest.org
A series of hardware tests that run directly from the web browser. It has for keyboard, mouse, screen, video game controls… For free.
Manual do Usuário (“User's Guide” in Portuguese) is a personal tech blog focused on healthy digital life. Also, it's a cool place on the internet. Created and maintained by Rodrigo Ghedin. Learn more.
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Web services based on free software - Português