@andyn In alphabetical order:

Affinity
@bbedit
BetterSnapTool
Carbon Copy Cloner
@devontechnologies DEVONthink
@drafts
Due
Final Cut Pro
Hookmark
Keyboard Maestro
Keynote
LaunchBar
MAMP Pro
Numbers
@OmniFocus
@OmniGraffle
@OmniOutliner
Pages
PanoramaX
@jamesthomson PCalc
SpamSieve
TextExpander
Transmit
@unread Unread

There are others, of course, but these are first.