Today, the leading spreadsheet packages are Microsoft Excel and Google Sheets. Apple Numbers is popular on the Mac platform. Other packages are LibreOffice, Quatro Pro, and Zoho. Apache Open Office is free.
While it may be true that some of the things mentioned above could be done in a word processor, spreadsheets have a huge advantage over word processors when it comes to numbers. It would be impossible to calculate multiple numbers in a word processor and have the value of the calculation immediately appear. Spreadsheets are also much more dynamic with the data and can hide, show, and sort information to make processing lots of information easier.