UseResponse - Open-source, self-hosted customer feedback software, live chat and helpdesk system that you can install on your server. Organize documentation using knowledge base and get feedback from social networks with centralized system
Warmup Inbox - Warmup Inbox is a tool that automates the process of warming up your email inboxes, raising your sender reputation and inbox health automatically.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Warmbox.ai - Warm up your cold email inbox, and never land in spam anymore!
Olark - Real-time chat and monitoring of your website visitors through Google Talk and Jabber.
MailReach.co - The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.