Automations:
https://support.zendesk.com/entries/20012032-streamlining-workflow-with-time-based-events-and-automations
Asset Management:
http://www.zendesk.com/blog/gotomanag-integration-simplifies-it-service-management
Chat:
https://support.zendesk.com/entries/358912-introducing-zendesk-chat
CNAME:
https://support.zendesk.com/entries/13976-mapping-a-host-name-of-your-own-to-zendesk-using-cname
CSS Cookbook:
https://support.zendesk.com/forums/20146877-css-cookbook
http://www.zendesk.com/blog/tip-of-the-week-making-css-customizations-to-a-single-page
Custom Ticket Fields:
https://support.zendesk.com/entries/20611326-adding-and-using-custom-ticket-fields
Dynamic content:
https://support.zendesk.com/entries/20720458-using-dynamic-content-to-provide-multiple-language-support
Email Forwarding:
https://mail.google.com/support/bin/answer.py?hl=en&answer=10957
https://support.zendesk.com/entries/6974-forwarding-emails-from-microsoft-exchange-fastmail-or-gmail-to-zendesk
https://support.zendesk.com/entries/20041133-lesson-3-customizing-the-customer-experience
Email Headers:
http://kb.mediatemple.net/questions/893/How+to+view+email+headers
Email Only Support Desk:
https://support.zendesk.com/entries/20012681-how-to-set-up-an-email-only-helpdesk#comments
Email Templates:
https://support.zendesk.com/entries/20378368-customizing-your-email-templates#comments
Enterprise:
https://support.zendesk.com/entries/20292353-setting-up-to-manage-multiple-brand-help-desks
https://support.zendesk.com/entries/20327676-getting-started-with-the-zendesk-enterprise-plan
GoodData:
https://support.zendesk.com/entries/216428-introducing-gooddata-for-zendesk
Organisations & Groups:
https://support.zendesk.com/entries/20049342-creating-managing-and-using-organizations
https://support.zendesk.com/entries/20050286-about-organizations-and-groups
Placeholders:
https://support.zendesk.com/entries/20203943-zendesk-data-object-placeholders-reference#comments
https://support.zendesk.com/entries/20011631-using-placeholders
Placeholders (Liquid):
https://support.zendesk.com/entries/20134837-using-liquid-markup-to-customize-comments-and-email-notifications#comments
Reporting:
https://support.zendesk.com/entries/20116851-using-reports-to-monitor-ticket-activity-and-agent-performance
https://support.zendesk.com/entries/173975-reporting
Satisfaction Ratings:
https://support.zendesk.com/entries/20052853-introducing-customer-satisfaction-ratings-for-zendesk
Suspended Tickets:
https://support.zendesk.com/entries/20512557-managing-suspended-tickets
Tags:
https://support.zendesk.com/entries/20011393-using-tags
https://support.zendesk.com/entries/20201222-adding-tags-to-users-and-organizations
Time Tracking:
https://support.zendesk.com/entries/51030-time-in-state-widget
Triggers:
https://support.zendesk.com/entries/20011606-streamlining-workflow-with-ticket-updates-and-triggers
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