Tweecious is a Firefox browser addon that go through your tweets, find those with links and post them to your delicious account. It don't need your passwords and will never try to get it or ask for it. And utilizes four different bits of internet Kung-Fu - Twitter, Delicious, Longurlplease, and Zemanta to monitor, sync, and tag links all without you ever lifting a finger.

Download: Tweecious