Navigation.pl is a Perl CGI script for generating navigation trees on your Web page. The tree content is loaded from a file on the Web server. Default file can be specified, but you can also pass a parameter to the script and specify a different config file. Thus, one instance of this script on your Web server can be used to show different trees.
ecasound.el is an interface to ecasound from within Emacs. It allows you to use an inferior ecasound process in an comint-derived mode. It features context-sensitive completion and wizards for adding chainoperators and the like. It allows you to write ECI-based applications in Elisp.
Yet Another Time Machine is a command line Ogg Vorbis and MPEG audio player with the ability to control the tempo of playback without changing the pitch. Primary usage would be to listen (for example) to audio books at 150% tempo. This is still understandable and saves time, hence the name of the program.