I’m glad to announce that first version of Big Number Calculator (Calcum) is available for public

Download

Here you can find an installer for windows: link

Available features

• Simple spreadsheet-like view of a single document:
  • Expandable 2-dimensional table of cells
• Each cell can contain integral number, text or formula, hexademical number format is supported
• Very big numbers are supported, with mantissa up to ~ 19 decimal digits
• Formulas support basic arithmetic operations: + - * / %. There is also support for bit shifts: << and >>
• Text concatenates with +
• Formulas can use custom fuctions which can be defined separately as a simple text
  • Predefined functions are available (mostly for string/character and list processing)
• Basic cells editing, row and columns insetion preserving correct order
• Copy/cut/paste operations of cell regions inside application
  • Data export to antoher applications through clipboard as CSV values
• Auto filling on region expansion
  • Convenient filling with Ctrl button pressed
  • Support for non-contigous multiple regions (with some restrictions)
• Whole table recalculation on cell value change
• Opening of file in CSV format is supported
• Saving files in CSV format

Summmary

Hope this app would be usefull for you. Enjoy.