SolidifyApp – Mega simple prototyping/click tracking tool for desktop and mobile usability testing.
UXRecorder – Mobile usability testing app (Create a native prototype in SolidifyApp and run it through UXRecorder = Magical).
Silverback App – Mac usability testing.
Trello – Organize all the things.
Skitch – Fab for UX reviews.
Balsamiq – Best collaborative wire framing tool on the market.
TargetProcess – Track Design/Development/QA progress and burndown.
GoToMeeting – Design collaboration via video chat/recording sessions & screen sharing with Audio.
Google Analytics – Analyze how your clients are using your product, look for pain points, adjust UX accordingly.
InVisionApp – Hi res desktop and mobile prototyping.
Bonus Tool:
Spotify – Great music gets the creative juices flowing!
UX Rocks 