The internet is one of the world's greatest inventions. It's also sometimes used by some real jerks to do some pretty crappy stuff. If you've ever had to deal with online harassment, or are just worried you might, Speak Up & Stay Safe(r) teaches the basics of dealing with jerks online.
The site was created by non-profit organisation Feminist Frequency. It covers basic security lessons everyone should learn regardless of any harassing behaviour (such as enabling two-factor authentication and how to create good passwords), but also provides more in-depth tips on how to remove your personal information from people finder sites.