A simple address and contact management PHP script
...It provides many features that you would find in a similar offline, OS specific application. It also has multi-user capabilities.
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tellmatic is a php and mysql based newsletter script to create, manage and send personalized newsletters or mass mails. uses wysiwyg and has a form editor. adresses and newsletter are stored in unlimited groups. handle bouncemails and failed adresses
m2 is a network message bus designed to support low-latency, service-routed message passing, with push updates and scalable publish / subscribe capabilities. Client support exists for Tcl and Javascript currently, with others planned.