http://www.booksshouldbefree.com/ - This site has free Ebooks that can be downloaded to phones, tablets, pc. It actually has some good books on it.
http://www.ps3-themes.com/ - Install themes straight to your ps3 for free, some bad ass themes user made themes and actual released themes, even tutorials on how to make your own theme. If you click install it shows you how to download straight to your ps3, not sure if it works with ps4 but I dont see why not.
http://www.typingstudy.com/ - Free typing lessons. Some jobs require fast typing or maybe you just wanna learn to type fast. This site teaches you all the shit you need to know.
http://www.codecademy.com/ - Learn to code anything for free. Websites, games, apps. They have a online community and groups that you can join so that you have people to code with and stay motivated.
https://addons.mozilla.org/en-US/firefox/addon/panic-button/ - Don't wanna get caught looking at the IC at work or don't want your mom, son, daughter, wife to catch you looking at porn then check out the panic button! the link I provided is for firefox but through a google search you can see its also available for chrome and maybe other browsers.
http://www.southparkstudios.com - Not everybody is a fan of the show but this site has all episodes of southpark for free in good quality.
http://digital-photography-school.com/ - Learn photography. Tutorials, tips, tricks, etc.. etc.. thing they have forums there too.
https://www.ghostery.com/en/ - An Add-on that basically stops sites from tracking you.
http://www.musictheory.net/ - Site for learning music theory
http://www.coastal.com/Coupon-Applicable-Glasses - Get some eye glasses, first pair FREE for first time customers. All you gotta do is use their code "firstpairfree" I guess at the checkout, don't believe me check the link. Saw some reviews that they actually are free.