xinetd has access control mechanisms, extensive logging capabilities, the ability to make services available based on time, and can place limits on the number of servers that can be started, among other things.

GNUMail is a clone of NeXT/Apple's Mail.app application. It uses the GNUstep development framework (or Apple Cocoa, which is based on the OpenStep specification provided by NeXT, Inc.).

phpLDAPadmin is a web-based LDAP client. It provides easy, anywhere-accessible, multi-language administration for your LDAP server. Its hierarchical tree-viewer and advanced search functionality make it intuitive to browse and administer your LDAP directory. Since it is a web application, this LDAP browser works on many platforms, making your LDAP server easily manageable from any location. Usually, you may access PLA by pointing your browser to http://<webserver>/phpldapadmin .

scrot (SCReenshOT)is a simple command line screen capture utility. It uses imlib2 to grab and save images.

xbindkeys is a program that allows you to launch shell commands with your keyboard or your mouse under the X Window System. It links commands to keys or mouse buttons, using a configuration file. It's independent of the window manager and can capture all keyboard keys (ex: Power, Wake...).

scalpel is a fast file carver that reads a database of header and footer definitions and extracts matching files from a set of image files or raw device files.