Block Together - A useful tool which helps you block trolls on Twitter.
WebPurify - Profanity Filter, Image Moderation and Video Moderation Services Made Easy.
BlockParty - Real-time voice chat rooms from the creators of turntable.fm
Smart Moderation - Stop Inappropriate Comments using Artificial Intelligence
Secateur - Use Secateur if you want to temporarily or permanently block or mute (or both block and mute) a Twitter account and all its followers.
Bodyguard - Smarter toxic content moderation for people and businesses