The Queue plugin for CakePHP provides deferred task execution.
Plugin to store mail in a queue for later sendout
CakePHP wrapper plugin around Queuesadilla, a generic php queueing backend
Gearman utilities for CakePHP
CakePHP Aws Simple Queue System
A minimalistic Queue Plugin for CakePHP
AWS Simple Storage Service (S3) & Simple Queue Service (SQS) database drivers for CakePHP