Open source - Live Support chat for your website. Web and desktop clients. Co-Browsing, XMPP notifications, GTalk, Jabber, Openfire, Skype, Chrome extension, Node.js support, MySQL, PostgreSQL
osTicket is a widely-used and trusted open source support ticket system. It seamlessly routes inquiries created via email, web-forms and phone calls into a simple, easy-to-use, multi-user, web-based customer support platform. osTicket comes packed with more features and tools than most of the expensive (and complex) support ticket systems on the market.