1)   WinDate Calculator 2.4
WinDate Calculator is a flexible utility program that allows you to quickly perform date calculations without having to manually thumb thru a calendar. It can work with any dates between September 14, 1752 and December 31, 3999.
date calculator, date, calculator, systray, system tray, calendar, days, weeks, months, years,

 2)   Acute Softwares Diary 5.0
Quickly and easily manages Appointments, Tasks and Notes even if the main program isnt running. Also reports on what applications and files you used during any day, week or month - great for people who have to produce timesheets.
diary, pim, pcusage, logging, journal, tasks, todo, date calculator, appointment, event,