Free-form spreadsheet-ish app for Mac and Windows

I’ve just discovered a unique app on the Mac App Store called Calca. It’s like a simple word-processor, except you can define variables and functions and do arithmetic with them, and it understands units and currencies and it handles matrices and vectors, and supports basic Markdown, and … it’s pretty amazing.

Screen Shot 2013-12-07 at 2.21.19 PM
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