Phaseware Self Service Center - Self Service center allows incident submission, access to knowledgebase, FAQs, and crowdsourcing through forums and communities.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Support Hero - Educate your customers through self-help support
HelpDocs - Educate your users with a super simple knowledge base that’s built for teams just like yours.
phpMyFAQ - phpMyFAQ is a world’s most popular mobile-friendly, feature-rich and open-sources FAQ software that uses PHP 5.
MindTouch - MindTouch is a cloud-based web platform for knowledge collaboration and multi-channel delivery of customer support documentation.