DooM Legacy is an enhanced port of Doom, the classic first-person shooter from iD Software. It features high screen resolutions, an OpenGL renderer, fullscreen modes under X, client-server architecture for up to 32 players on IP-networks, Quake-style keybindings, a console, and more. It is available for Linux, DOS, and Win32.
Domtools is a set of Unix shell commands that allow you to traverse DNS domain hierarchies, list all hosts (or subdomains) within a given domain, convert a host name to an IP address and vice-versa, convert a normal IP address to "in-addr.arpa." format and vice-versa, and more. These commands can be used manually, or included as building blocks for higher level DNS tools. Output is easily computer parsable.
dolt is a cross platform HTML preprocessor, which replaces specially formatted HTML comments with the contents of another file. It works much the same way as SSI, but without the server requirements, as files are processed before they are uploaded to a Web server. For example, it allows you to update a menu on every page by changing one file. This gives you some of the benefits of frames without any of the problems.
DocWiz allows you to easily add JavaDoc comments to your Java source code. With DocWiz, there's no need to tediously hand-format JavaDoc comments, adding tags and comment structures for each method. DocWiz provides a list of all the fields, methods, interfaces, and classes defined in a Java source file. You can click on any of these code elements to display a fill-in form for information about code elements. In addition, DocWiz shows you an icon for uncommented code segments.
dobackup.pl is a flexible Perl script to handle unattended incremental backups of multiple servers. It handles multiple media sets with automatic media preparation and rotation, configurable 'what-to-backup', global per-host exclusion patterns, and user settable 'don't-back-this-up' metafiles. Its design goal is zero-maintenance, nothing to do except change the media when told.