[andrewtj]

One more for OS X that's relatively unknown is the 'Go To Folder' shortcut in file dialogues. It's accessed via ~ and supports tab-completion — opening something in ~/Documents something becomes: cmd+o, ~, ~/D[tab]<enter>, filename<enter>

[zacharypinter]

Command+Shift+G shows the "Go To Folder" prompt as well, with the added benefit of working in the finder as well as open/save dialogs.