Editor’s note: The following review is part of Macworld’s GemFest 2013. Every day (except Sunday) from mid-July until late September, the Macworld staff will use the Mac Gems blog to briefly cover a standout free or low-cost program. Learn more about GemFest in this Macworld podcast. You can view a list of this year’s apps, updated daily, on our handy GemFest page, and you can visit the Mac Gems homepage for past Mac Gems reviews.

A cross between Cloud and Skitch, Glui ($5) allows you to quickly snap, annotate, and upload screenshots to its Glui.me service via your Dropbox account.

The app lives in your menu bar, represented by a camera outline, though you can also just have it run in your Dock; click it and choose whether to take a crosshair snapshot, window snapshot, or use an image you’ve copied to your clipboard.

Once you’ve taken a screenshot, the Glui interface lets you modify your picture with arrows, boxes, freehand drawings, text, and my personal favorite, auto-pixelation.

After you’ve modified an image to your liking, you can choose to email, iMessage, tweet, post to Facebook, save it to your computer, or upload it to Dropbox. Upload to Dropbox, and the screenshot is saved both to your account and loaded on glui.me.

The app is incredibly simple, no bells or whistles to be found, and it excels as a result. It’s the screenshot app I never knew I needed.

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