Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
24me - Next Generation Personal Assistant
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Pocket Informant - Pocket Informant is the Best Calendar app for mac and iOS. Pocket Informant for iOS, Mac desktop, and Android.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
WeekCalendar - WeekCalendar is an all-in-one calendar application designed to provide everyone with all the features they need to work to their fullest.