NDepend users may be pleased to hear that they can indeed look for untested new or changed code. According to Patrick Smacchia:

Yes you can play with both comparison and test coverage.
Btw, we added a set of default rules/queries about that,
in Diff / Changes / Evolution -> Test Coverage of Changes Summary

Automated functional testing lives between two sensible testing activities. On the one side, there’s conventional TDD (unit testing). On the other side, there’s manual exploratory testing. It is probably more important to get good at those than it is to get good at automated functional testing. Once you’ve gotten good at them, what does it [...]

Agile Alliance Functional Testing Tools Open Space WorkshopCall for ParticipationDates: Monday, August 4, 2008Times: 8 AM - 6 PMLocation: Toronto, Ontario, at the Agile2008 venueDescriptionThis is the second Agile Alliance Functional Testing Tools workshop.The first, held in October 2007 in Portland Oregon, was a greatsuccess. In this second workshop, we're increasing the size andmoving to [...]