Constrictor

Constrictor screenshots

Screenshot utility for OS X. A positionable frame lets you grab the right area every time
Constrictor 3.3 : Main window

Alternative downloads

Skitch
2.9
FREE
Take screenshots and export them to various image formats.
CloudApp
6.3
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Take snapshots and record screen activity on your Mac.
Knot Guide (100+ knots)
1.3
#1 Knot App on iTunes!!! Now with 101 knots and continuous new additions!