Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Startup Stash - A curated directory of 400 resources & tools for startups
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Content Marketing Stack - A curated directory of content marketing resources
Apple Numbers - Numbers lets you build beautiful spreadsheets on a Mac, iPad, or iPhone — or on a PC using iWork for iCloud. And it’s compatible with Apple Pencil.
StartupResources.io - Tightly curated lists of the best startup tools