Photoshop
From Wikicliki
i use so much photoshop i thought it would be silly to have a page onnit
anyway these shortcuts are teh shit:
http://www.webdesignerwall.com/tutorials/photoshop-secret-shortcuts/
best one being the option-click on visible icon to just see that icon however, it appears to do it as a "passthrough" what does that mean? must investigate further...