HttpMaster - HttpMaster is a professional software tool for testing and debugging HTTP applications, primarily aimed at REST API applications and web services.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Hoppscotch - Open source API development ecosystem
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Request inspector - Debug web hooks, http clients
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.