I'm also thinking of something similar as a potential part of my 'tiny-chunks-of-reference-info' project. That is, some of the chunks would be parameterizable w

I'm also thinking of something similar as a potential part of my 'tiny-chunks-of-reference-info' project. That is, some of the chunks would be parameterizable with active computation. There might be a bunch usable from the desktop 'Qalculate!' for formula/units interpretation: http://qalculate.sourceforge.net/ http://qalculate.sourceforge.net/ (Converting 'Qalculate!' into an all-Javascript, single-web-page application might be an interesting project, too...)