www.sfdcwizard.com/2013/06/force-com-order-of-execution-diagrams/
As of API 28.0 (JUN-2013)
The diagrams aim to give you a better understanding of the platform's Order of Execution by visualzing the flows as described in the Online Documentation.
Triggers and Order of Execution http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_triggers_order_of_execution.htm
Order of Execution for Visualforce Page Get Requests http://www.salesforce.com/us/developer/docs/pages/Content/pages_controller_get_request.htm
Order of Execution for Visualforce Page Postback Requests http://www.salesforce.com/us/developer/docs/pages/Content/pages_controller_postback_request.htm
- OmniGraffle
- Visio
- PNG Images