[Arcsech]

I've been thinking along some similar lines myself recently, that I'd like to have notes that can link to code in some kind of semi-durable way (i.e. as resilient as possible to changes), be able to run code snippets in a variety of languages, etc., and the only things I've found that are able to do this are:

1) Emacs with Org Mode, which is very powerful but has a learning curve like a brick wall, even if you already know emacs. Also nearly impossible to use with anything except emacs (yes, there are mobile/web apps that understand standard org syntax... which doesn't help with any customizations you make, which is like half the point of org mode).

2) Glamorous Toolkit, which is based on Pharo Smalltalk and is easier to use than org mode, but less featureful, much newer (== smaller community, less support), and has many of same problems (i.e. can't easily use it on any non-desktop platform).

It's looking more and more like I'm going to have to build something myself for this.