1) For textbooks: http://book4you.org/
2) For journal articles: http://booksc.org/
If there exists a physics text or a journal article then you'll probably find them in those websites. Enjoy!
Question: When I became disabled I created a physics website to help students study physics. It's under construction right now but it has some old pages that I placed there since the subject came up so often that I thought that it would be best to have it so I don't have to repeat myself. My question is whether it would be okay to post the URL to the site? It's a non-profit organization, you can't buy anything there. In the future I'll be offering my tutoring services for a fee if one chooses to hire me. But that's not the purpose of the website. May I post the URL of the main webpage?