Good news for bloggers using Drupal: pingback module is here, at last.

The spam module provides four main mechanisms for automatically detecting spam: a trainable Bayesian filter, manually entered custom filters, counting the number of URLs, and detection of content posted from open email relays.

The Links Package is a multi-module set for managing URL links in a master directory, and attaching them in various ways to your content pages. It includes both an API for developers and user-visible content modules.

The userlink module allows users to save and share links (bookmarks, URLs). To access the full potential of the userlink module, we recommend using the functionality offered by freetagging, and the contributed module tagadelic.

A mass category editor. Quickly manage the taxonomy terms associated with your nodes. Once installed, you will see a new tab on your admin/node page.