Dateutils are abunch of toolsthat revolvearound fiddlingwith dates andtimes in thecommand line,with a strongfocus on usecases thatarise whendealing withlarge amountsof financialdata. Theirtarget marketis shellscripts thatneed datecalculations orcalendarconversions,and as suchthey are highlypipe-able andmodeled aftertheirwell-knowncousins (e.g.dtest vs. test,or dgrep vs.grep).
calcurse is acalendar andschedulingapplication forthe commandline. It helpskeep track ofevents,appointmentsand everydaytasks. Aconfigurablenotificationsystem remindsuser ofupcomingdeadlines, thecurses basedinterface canbe customizedto suit userneeds and avery powerfulset of commandline optionscan be used tofilter andformatappointments,making itsuitable foruse in scripts.