Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
A computer application that replaced paper worksheets is called a spreadsheet. It shows multiple cells that together make up a grid consisting of rows and columns, each cell containing either alphanumeric text or numeric values. A spreadsheet cell may otherwise hold a formula that classifies how the contents of that cell is to be calculated from the contents of any other cell (or combination of cells) each time any cell is updated. Spreadsheets are often used for financial information because of their capacity to re-calculate the entire sheet automatically after an alteration to a single cell.
If you think that the proprietary and expensive Microsoft Excel is the only available and capable spreadsheet software, then think again because you are wrong. There are quite a number of free/open-source spreadsheet programs that are almost as good or even at par with Excel.
Here are some of the most known free/open-source software spreadsheet applications: