devRant - Community for developer to connect over fun rants about tech

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

Xing - World-wide social network service aimed at business professionals.

LiveChat - LiveChat - premium live chat software. Approach customers directly on the website, make connections and drive more sales using LiveChat.

LinkedIn - LinkedIn is a business-oriented social networking service, mainly used for professional networking.

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.