From the author of the original 1992 game KYE, the TreeCel calculator was inspired by the shortcomings of the common spreadsheet programs. The TreeCel calculator is a small program which tries to improve things by: Showing an expression and its results side by side. Using simple and clear constructs like If and For.
Allowing structured data like arrays. Using a tree-like structure. Step by step debugging. Output from TreeCel can be imported directly into you favorite spreadsheet programme by a simple copy and paste operation.