Offering preliminary support for OS X 10.8 Mountain Lion, Rogue Amoeba’s Audio Hijack Pro gets bumped up to version 2.10.4 with an updated Instant On component (now version 6) that improves overall system audio capture. In fact, the Instant On component is now required for capturing audio from Safari and QuickTime Player when running Mountain Lion, as well as when snagging audio from a Fluid app. ($32 new, free update, 5.2 MB, release notes)
Create Multiple Inspectors in iWork
Tired of flipping between panes in the Inspector in Keynote, Pages, and Numbers? You can open multiple copies of the Inspector window with View > New Inspector, but even better, you can Option-click one of the icons at the top of the Inspector window to open that pane in a new Inspector.