Sendmail Extended Queue Groups is an m4 file that can be used to add extended queue groups to Sendmail 8.12.x. Extended queue groups allow administrators to choose multipe queue groups based on the sender, recipient, or sender and recipient pair. This improves upon the default plain queue groups feature, which can only operate on recipients.
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.
pb.WebMAUI (Web-Mail Administration User Interface) is a Web-based administration tool for managing complex mail domains, mail user accounts, server-based filtering including "out-of-office mail replies", and mail-related tasks. User quota managment is supported as well. Currently, the Courier mail suite is used, but support for other MTAs is planned.