PixelStick, Screen Calipers, PixelSake, xScope, Pixel Ruler, JR Screen Ruler, QuickLens, KRuler, JR Screen Ruler Pro, On-Screen Ruler, Bluegrams Screen Ruler, Meazure, A Ruler for Windows, Red Lines Tools, Pixel Ruler for Android, Screen Ruler Professional, ScreenRuler, Pixus, Pixel Ruler 2.0.2, Cubic Ruler, ReadingRuler, MezerTools, orangePixelMeter, PixelRuler, Window Ruler, Measure Schmeasure are some alternatives to PixelSnap 2.