hCaptcha - Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.
Block Together - A useful tool which helps you block trolls on Twitter.
reCAPTCHA - reCAPTCHA is a free security service that protects your websites from spam and abuse.
Moderate - Identify, mute, and block trolls in your Twitter feed
UniqPin - UniqPin is a free for non-commercial use service which destiny improve ability of interfaces detect...
Boyfairy - Your opportunity to educate right before you block someone.