The Hacker’s HandBook [ PDF ]

BlARROW is a unilingual, electronic, free-content site which composes write-ups on issues concerning online security. It is run helpfully by content scholars who write on a broad scope of subjects. Anyone with access to the internet connection and an ache to gain some new useful knowledge can get to these articles. Aside from this, they additionally give Udemy coupons, Appstore Games, and applications, all for free. So, in case one is curious to learn something new, gain widespread knowledge without drawing a hole in the pocket.