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Extensions 
Chrome
Web store 
Delta Air Lines SkyMiles® Shopping button
Never miss out on miles with Delta again. Install the SkyMiles® Shopping browser extension and activate miles at hundreds of stores.
Formatted email subject lines by cloudHQ
Formatted email subject lines: underscore, bold, italics, strikethrough
Marble Lines
You need steady aim to match like-colored marbles in this Zuma-like puzzler. Shoot marbles using the mouse, but be quick about it.
Color Lines - online puzzle game
Puzzle - Arrange balls with the same color in lines of 5 and get points.
Zaqwes Guide Lines
Layouts every day? Designer or web developer? It will help you to check grid or relative positions of elements on page.