Spreadsheet is a web-based Spreadsheet program similar to MS Excel, OpenOffice Spreadsheet and Google Spreadsheets.
The idea behind Simple Spreadsheet was to write a web-based spreadsheet application which uses all kinds of standards that are available around the web.
Charts: line graphs, bar graphs, pie graphs, linestep graphs, scatter graphs
Cell formatting (using full CSS)
Cell formats (Numbers, Strings, Currencies, Dates, Times)
Cell merging (rows and columns)
Cut/Copy/Paste with single cells or ranges of cells
Custom column groups
Custom names for columns and rows
Custom styles for columns, rows and column groups
Integration of images from the web
Operations like deleting and inserting columns/rows
Keyboard navigation with cursor keys
Live preview of the calculated result while typing
Common keyboard shortcuts for cut/copy/paste, delete
Automatic highlighting for links