Magic Number Machine scientific calculator
The folks over at MacResearch point to the Magic Number Machine, a nice open source scientific calculator from Matt Gallagher. It has a lot of what you would naturally expect from a good handheld calculator, but also some Mac specific features like the ability to change the insertion point by clicking on the display, keyboard shortcuts, and a slide out drawer for your "expression history." If you're in need of a scientific calculator a bit more powerful than Apple's built-in application, but don't want to shell out $19 for PCalc, then the Magic Number Machine looks like a good choice (even if it's not quite as stylish as some of the other options and doesn't do RPN).
The Magic Number Machine is a free download from Matt's website and includes the source. (Note: when I tried to mount the DMG it gave me a warning, but I ignored it was able to mount it and install the application without any problems).
[Via MacResearch]
