Block Together - A useful tool which helps you block trolls on Twitter.

HiOperator - HiOperator is a virtual assistant that answers phone calls, chats with customers, provides in-app help, takes orders, and provides support.

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.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

CleanSpeak - Keep inappropriate content and trolls out of your community

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.