Jaro Mail is an integrated suite of interoperable tools for GNU/Linux and Apple/OS X to manage email communication in a private way, without relying on online services (in fact, encouraging users to store email locally). It mainly features a system for mailinglist filtering, address-book integrated whitelisting, and long-term email storage and archiving with functions for fast search and usage statistics. It makes internal use of customized versions of popular Unix tools like Mutt, Fetchmail, Procmail, Mairix, and Msmtp.
MCM is a set of tools that ease the management of multiple servers. It's aimed at network or system administrators who need to connect to different servers by different means every day. It can be used via an ncurses interface without requiring an X server, and via a GNOME-based GUI.
Bashinator is a bash shell script framework. It provides flexible and powerful message handling that lets you print to stdout, log (to syslog or a logfile), and mail messages with a single message function. Exhaustive information is included in messages to ease debugging. This information includes timestamps, message severity, source file, line numbers, and function names. A facility for tracing the function call stack is provided. Sub-command output can be logged by capturing the stdout/stderr of external commands to a dedicated temporary logfile. The framework also provides lockfile handling.