D8: Maintaining a canonical path and redirecting alternative URL's like non-aliased path, path without language prefixes and so on (Previously provided by Global redirect)
D8: Separate Redirect 404 module that logs aggregated 404 request (can suppress them in the default log) and allows to create redirects from them
D8: Separate Redirect Domain module allows wildcard and domain redirects
Mailhandler uses Feeds to let you post nodes by email. It takes mail (usually from an IMAP mailbox) and imports it as whatever type of content you choose. Plug-in modules allow you to do more awesome things like post comments, select different authentication methods, and set properties such as published / sticky status using "commands". Hugely powerful and flexible, but includes a "quick-start" module to help get you started.
A module that lets you track CVS commit messages. You can see it in action at http://drupal.org/cvs. Interfaces with the project module to make releases via specific CVS branches and tags, and provides per-project source code access control.
The Drupal bbcode.module adds a BBCode filter to Drupal. This allows you to use HTML-like tags as an alternative to HTML itself for adding markup to your posts. BBCode is easier to use than HTML and helps to prevent malicious users from disrupting your site's formatting.