I have developed quite a few:
- A ongoing conversion of the Biopython tutorial
- A set of notebooks for population genetics simulation
- The notebooks from my book Bioinformatics with Python Cookbook
In terms of scope, the ones related to the book cover a lot of areas.
This is a pretty awesome gallery of ipython notebooks from github that span a large range of subjects https://github.com/ipython/ipython/wiki/A-gallery-of-interesting-IPython-Notebooks#mathematics-physics-chemistry-biology
This one is quite impressive and fully dedicated to bioinformatics http://readiab.org/