OpalCalc

OpalCalc is a brand new type of calculator for the PC. As easy to use as Notepad or A Word Processor, OpalCalc allows you to insert natural language as part of the sum, along with multi-line support so you can go back and adjust your previous calculations. Features: *Lightweight footprint (only 600k)*Multiline support (notepad style)*Configurable GUI with colour schemes*Built-in `Quickstart` tutorial*Full colour coding*Multiple undo/redo, zoom in/out, etc.*Numerous built-in functions*Percentages & hundreds of measures*Currency support with conversion*Portable (260k from a pen drive!)*Custom variables and functions*Programmer syntax and functions*Custom number base support*Advanced notation support