great portal: [8wayRun.Com] XenPorta (Portal) 1.5.3a
great for "alerting" others: [bd] Tag Me 1.5.6
Handy for many reasons: Nodes As Tabs 1.1.2c
Template Modification System (TMS) 1.1.1 : - many addons require this .... definitely install this.
What are you looking for ?