Feng Office - Feng Office is a commercial Open Source web based solution aimed to enhance collaboration and productivity
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
LibreOffice - Free office suite, open source, and compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files. Updated regularly – download for free. Originally based on OpenOffice.org.
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Redmine - Flexible project management web application
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.