ShiftN is described as 'Intelligent tool capable of analyzing photos and fixing the line distortion (line convergence) effect automatically or with minimal user’s input. Batch processing. The software analyzes the source image, detects vertical lines and performs the correction, making' and is a Image Editor in the photos & graphics category. There are more than 10 alternatives to ShiftN for a variety of platforms, including Windows, Mac, Linux, Web-based and iPhone apps. The best ShiftN alternative is GIMP, which is both free and Open Source. Other great apps like ShiftN are Adobe Lightroom, showFoto, scri.ch and PaintStar.