QuickViewer

Sequential is an image viewer for Mac OS X. It was originally designed for opening a folder of images and displaying them in order. It works well for viewing comics and manga. Sequential can display folders and archives (ZIP, RAR, CBZ, and CBR) of images (including JPEG, PNG, and GIF) and PDF files. It is able to load images on the internet from a page or image URL. Sequential has mature full-screen support and can display images' Exif data. All of Sequential's source is available through Git. Once your code is working and well-tested, you should be able to create patches.

VieasEx is an image viewer, converter, and retouching tool with a combination of two window forms. Image Preview is useful for editing and saving. It can be downloaded from the software page. Susie plug-ins are available to load other files or to extract from other archives. Undo, redo, select, paintbrush, correct brush, merge text, merge image, crop, resize, Expand canvas, rotation, mirror, flip, equalize, correct (histogram/gamma/brightness/contrast/highlight/shadow/color balance/hue/saturation), replace color, negative. Unsharp mask, blur, soft focus, denoise, effects (color filter/mosaic/diffuse/emboss/edge detection/posterization/oil painting) Other functions print, set wallpaper, count colors, copy/paste/delete file, launch the external tool. Key customization, multiple monitors support. Compression level, filter, interlace, gamma, transparent color, and comment. Open dialog box, file associations, send to menu, drag, and drop.