vmm is an easy-to-use and configurable commandline tool for administrators and postmasters, used to manage domains, alias-domains, accounts, and relocated mail users. It allows fast and easy management of mail servers. It's designed for installations using Dovecot and Postfix with a PostgreSQL backend.
Roster is DNS management software for use with Bind 9. It is licensed under the BSD license. It is written in Python, and uses a MySQL database with an XML-RPC front-end. It contains a set of command line user tools that connect to the XML-RPC front-end. The config files for BIND are generated from the MySQL database, so a live MySQL database is not needed. The software has four basic components. The core includes the database interface and core API, and contains the authorization layer. The server is an SSL enabled multi-threaded XML-RPC server. It also contains the LDAP authentication layer. The config manger creates BIND config files using the core API, and handles pushing the files to their appropriate servers. The user tools contain over 20 tools to create, list, and remove records, zones, views, DNS servers, DNS server sets, groups, users, and the assignments between them all. There is currently support for views, many DNS servers in many configurations, IPv6, user/group authorization, LDAP authentication, and Unicode hosts.
Autojump is a tool that acts as a complement to cd: it makes navigating your filesystem a lot faster. It works by automagically maintaining a database of the directories you use the most from the command line, and allows you to jump back and forth between them, by typing just a few letters of the name of the directory you want to jump to. It works for Linux, Mac, and Cygwin under Windows.
Clicco is a tool for constructing command line commands based on saved configurations. It is ideal if you have difficulty remembering the exact commands, arguments, or argument values for various situations, as you can save commands with various argument choices for future use along with a description.
pulseaudio-mixer-cli is an interactive ncurses UI to control the volume of PulseAudio streams. It is somewhat like alsamixer, but focused not on sink volume levels (which can actually be controlled via alsamixer, with the alsa-pulse plugin), but rather on the volume of individual streams from applications, allowing the user to balance sound levels between them. Interaction with pulseaudio is done through the DBus interface, and the UI is designed to be as simple as possible, without heavy DE dependencies like GNOME libs or KDE/QT.
SearchBin is a fast commandline program for searching within binary files. It's a bit like grep for binaries. It offers wildcard matching and has three capabilities for searching: for bytes using hexidecimal, for a plain text string, and for a smaller binary file. Any discovered matches will print the found offsets (0-based).