chitchat - Chat Room with Selfies and Pagers (yes, pagers!)

Talkus - Chat with your website users from Slack

Chalk - Chalk is a calculator that tries to do right what others do wrong.

Chatlio - When you have a business to run, your average instant messaging software just will not do. You need an internal presence upon which your entire team can collaborate on. Read more about Chatlio.

Twist - Check fewer notifications, do more meaningful work. Twist is the team communication app for calmer, more organized, and more productive teamwork.

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