- Scrivener (always my first and most used installed programme)
- Skim (Free PDF editor that meets my needs better than Preview)
- iClipboard (I couldn't do without this now I think!)
- Chrome (I don't like it but I have to have flash support sometimes)
- Default Folder X (Really, really useful little plug-in)
- Total Finder (Love the tabbed functionality of this one)
- Folder Brander (I like to make my folder icons more informative)
- Cubby (For backups)
I install lots of other stuff too that I use a lot, but these are the first.