$ apt-cache search todo
emacs-goodies-el - Miscellaneous add-ons for Emacs
sysutils - Miscellaneous small system utilities - dummy package
tofrodos - Converts DOS <-> Unix text files, alias tofromdos
calcurse - text-based calendar
devtodo - hierarchical, prioritised todo list manager
doc-linux-es - Linux documents in Spanish
doc-linux-html-pt - Linux HOWTOs in Portuguese (html format).
doc-linux-text-pt - Linux HOWTOs in Portuguese (text format).
ezpublish-src - CMS for e-commerce, e-publishing and intranets
gacc - personal finance tracking program
gdesklets-data - Applets for gdesklets
gnus-bonus-el - Miscellaneous add-ons for Gnus
gpe-todo - To-do list for GPE
gtodo - GNOME to-do list manager
gtodo-applet - GTodo applet for the GNOME panel
hnb - Hierarchical notebook
irm - Web-based asset tracking system for IT departments and help desks
jpilot - graphical app. to modify the contents of your Palm Pilot's DBs
libpalm-perl - Perl 5 modules for manipulating pdb and prc database files
librra0 - Library to deal with synchronisation with WinCE devices
librra0-dev - Library to deal with synchronisation with WinCE devices (dev files)
librra0-tools - Library to deal with synchronisation with WinCE devices (tools)
libtododb0 - library that provides access to gpe-todo's database [runtime]
libtododb0-dev - library that provides access to gpe-todo's database [development]
mnemo - Notes and Memo Application
mnemo2 - notes/memos component for Horde Framework
mozilla-calendar - Todo organizer,calendar and reminder,integrated with Mozilla suite
nag - Multiuser Task List Manager
nag2 - task list component for Horde Framework
phpgroupware - web based groupware system written in PHP
phpgroupware-addressbook - phpGroupWare addressbook management module
phpgroupware-admin - phpGroupWare administration module
phpgroupware-bookmarks - phpGroupWare bookmark management module
phpgroupware-calendar - phpGroupWare calendar management module
phpgroupware-chat - phpGroupWare chat module
phpgroupware-comic - phpGroupWare comic strip parser module
phpgroupware-developer-tools - phpGroupWare developer tools
phpgroupware-dj - phpGroupWare mp3 database interface module
phpgroupware-eldaptir - phpGroupWare LDAP tree editor module
phpgroupware-email - phpGroupWare E-Mail client module
phpgroupware-etemplate - phpGroupWare etemplate module
phpgroupware-felamimail - phpGroupWare felamimail (Squirrelmail) module
phpgroupware-filemanager - phpGroupWare filemanager module
phpgroupware-folders - phpGroupWare folders module
phpgroupware-ftp - phpGroupWare ftp module
phpgroupware-fudforum - phpGroupWare fudforum module
phpgroupware-headlines - phpGroupWare headlines catcher module
phpgroupware-hr - phpGroupWare human resource management module
phpgroupware-img - phpGroupWare image editor module
phpgroupware-infolog - phpGroupWare infolog applcation
phpgroupware-manual - phpGroupWare on-line manual module
phpgroupware-messenger - phpGroupWare messenger module
phpgroupware-news-admin - phpGroupWare news administration interface
phpgroupware-nntp - phpGroupWare newsgroup reader module
phpgroupware-notes - phpGroupWare notes management module
phpgroupware-phonelog - phpGroupWare phone logging module
phpgroupware-phpbrain - phpGroupWare phpbrain module
phpgroupware-phpgwapi - library of common phpGroupWare functions
phpgroupware-phpsysinfo - phpGroupWare phpSysInfo module
phpgroupware-polls - phpGroupWare polling module
phpgroupware-preferences - phpGroupWare preferences management module
phpgroupware-projects - phpGroupWare projects management module
phpgroupware-qmailldap - phpGroupWare qmailldap module
phpgroupware-registration - phpGroupWare registration module
phpgroupware-setup - phpGroupWare setup III module
phpgroupware-sitemgr - phpGroupWare web content manager
phpgroupware-skel - phpGroupWare skeleton module
phpgroupware-soap - phpGroupWare SOAP module
phpgroupware-stocks - phpGroupWare stock management module
phpgroupware-todo - phpGroupWare todo list management module
phpgroupware-tts - phpGroupWare tts module
phpgroupware-wiki - phpGroupWare wiki module
phpgroupware-xmlrpc - phpGroupWare XMLRPC module
spe - Stani's Python Editor
tdiary-plugin - Plugins of tDiary to add functionalities
wmpinboard - Window Maker dock applet resembling a miniature pinboard
yank - yet another notekeeper
zim - a desktop wiki
postgresql-autodoc - utility to create system tables overview in HTML, DOT and XML