[Erwin]

For #1, I think the Mylyn plugin for Eclipse does something vaguely similar:

"Task context management in Mylyn is based on the idea that your interaction with a system can be transformed into a degree-of-interest model, where each element in the system is weighted according to its relevance to the task at hand. This degree-of-interest weighting forms the context of all the elements relevant to the task. The task context can then be used to focus the UI by highlighting the most important elements, filtering the unimportant ones, and allowing you to perform operations on elements of interest "

I use IntelliJ (or pycharm) myself but some people swear by Mylyn. Not having used Eclipse myself, the screenshot does't really tell much: http://www.eclipse.org/mylyn/images/mylyn-3.1-screenshot.png