Mac users interested in Stack exchange widget generally download:
Stacktop is a Mac client for accessing most of the Stack Exchange sites. This is an auto-search app where you input keywords every 10 minutes or so it'll search SO and tell you if there are any questions that haven't been answered that are about whatever your tags are.
Additional suggestions for Stack exchange widget by our robot:
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It shows the current contents of your Stack Exchange inbox in the menu bar.
of your Stack Exchange inbox...the new Stack Exchange API v2
Stackpop is an app for receiving Notification Center updates for Stack sites.
updates for Stack Exchange sites
iFruitBomb 4 DX is a fruit machine simulator for Mac.
simulator with a stack...Overs, Feature Exchanges
Universal application to control Santa Barbara Instrument Group (SBIG) CCD cameras (grey scale and color) and Optec or RoboFocus focusers....
align and stack images, composite...and Equinox 6 exchange data automatically