IFTTT is a service that lets you create powerful connections with one simple statement:
If this, then that. We call 'this' the Trigger, and 'that' the Action. Together, it is a Recipe.
Zapier makes it easy to automate tasks between web apps.
huginn - Build agents that monitor and act on your behalf. Your agents are standing by!
DERI Pipes is an open source tool for flexible Web Data mashup. Extensive support for RDF, XML and others.
Rapidly create workflows with the cloud components you love, no programming required