OpalCalc 1.86 + Portable-0daytown

OpalCalc 是一个符合自然语言的计算器，比如计算”今天”加”三天”等于”三天后的日期”。OpalCalc的算法很多，就时间来说，还可以计算如下午4点加5个小时是几点。3:15到5点是几分钟。还支持购物单模式，只需每行输入单价*数量，最下行加一个total就计算出结果了。当然还支持科学计算

OpalCalc 1.x + Portable | 1.4 MB

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. Want a tiny footprint on the screen for a single sum? Resize accordingly. Want it to fill the screen for heavy-duty work? OpalCalc can adapt. Featuring a lightweight footprint, on-the-fly calculation as you type, percentages, variable support, hundreds of units and functions, extensive notation support, intuitive design/documentation and much more. Once you’ve tried it, you’ll never want to go back to your ordinary desktop (or PC) calculator again!

Features include:
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 variables and functions (create your own too!)
Percentage support
Hundreds of measures, like kilograms and feet (create your own too)
Extensive date and time support
Currency support with conversion
Portable (260k from a pen drive!)
Load/save/print support
Programmer syntax and functions
Custom number base support
Advanced notation support
Comma decimal point support for Europe, Russia, and South America etc.