WBL is a really simple tool that can be used in a .qmail file for managing a white/black list of email addresses. It serves as a pre-filter to allow known-good friends and associates bypass the usual gauntlet of filters. Note that WBL is not intended to be a spam filter, it is simply an easy-to-use whitelist/blacklist management tool that serves to keep email that you really want to see out of your normal filters.
Webupdate is a script which lets you register Web pages and monitor them for updates. An email alert is sent to your local account whenever an update is found. It is also possible to register a pipe of commands to filter which content on the Web page should actually trigger an alert. The script can be used with crontab to get regular notifications whenever registered Web pages are updated.