iText - iText is an intuitive and refined text editor with word processing completely rewritten in Cocoa...
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
PSPDFKit - PSPDFKit is the best framework for working with PDF files. Our SDK provides first-rate PDF solutions for your application with features like annotating, signing, and form filling. We power successful projects for businesses across the globe.
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
UniDoc.io - PDF & Office Libraries In Pure Golang.
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.