Zopim - Live chat is a faster and more personal way for you to engage your customers. Free for 14 days. No credit card required.

LiveAgent - LiveAgent is a fully-featured web-based live chat and help desk software. It harnesses the power of a universal inbox, real-time live chat, built-in call center, and a robust customer service portal. Start your free 1 month trial today!

Banckle Chat - Banckle Chat is a online chat & customer support solution.

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

Bontact - Talk to your site visitors, their way

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community