Taza - Save your data with group messaging
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
CAKE - CAKE provides a SaaS-based solution for advertisers, publishers and networks to track, attribute and optimize their spend in real-time.
tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page
Chalk - Chalk is a calculator that tries to do right what others do wrong.
JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website