AutoForm. The fastest way ever to build dynamic web applications. You can build full .net applications just using a mouse and a web browser. You can watch the screencast here for how to build a Gallery in five minutes.
Search. Full text search of all umbraco content – the package even index everything automatically upon install
SubscribeUnsubscribe. Easy management of newsletters that integrates into the new mass mailer in umbraco 2.1
ContentType. Change the mime type of templates, making it easy to output umbraco data as xml or csv..