ToyViewer is an image viewer, which also provides various editing functions. Quick starting is one of the features. ToyViewer can display many kinds of image formats, and can save in some formats. Image files in a folder or a ZIP archive can be displayed one by one in full-screen.

Features:

Image Formats
tiff, jpg, pdf, png, gif, bmp, pict, JPEG2000, jbig, eps, svg, pcx, pcd, pnm(ppm, pbm, pgm), xbm, wbmp, SUN Rasterfile, and TIFF Stacks.
For example, if you have Adobe Photoshop, ToyViewer can display psd image files.
You can set ToyViewer to display any image format if there is a filter program to ppm format.

Save Formats
tiff, pdf, gif, bmp, png, jpg, JPEG2000, jbig, pnm, xbm, and wbmp.
Vector images such as PDF can be converted into bitmap images such as jpg or tiff.

Scan Folder
ToyViewer can display each image file in a folder one by one in full-screen. You can also mark images to move, or to delete them. With this feature, ToyViewer can be used as a Comic viewer.

Scan Zip Archive
ToyViewer can also display each image file in a zipped archive file one by one in full-screen. Besides, you can retrieve marked images from the archive.

Full-Screen Mode
ToyViewer can display images in full-screen and in front of all other windows. If you like a displayed image, you can make it the Desktop picture (wallpaper) of your Mac.

Animation
ToyViewer provides simple animation player for animated GIFs and TIFF Stacks. Besides, each frame of them and each page of PDF can be seen as a single image.

Image Operations
You can rotate, flip, or clip images. You can also enlarge or shrink images.

Color Operations
ToyViewer has ability to adjust brightness, contrast, color tone of images. You can replace specified color with other color or transparent color. You can also make images with palettes, monochrome images.

Effects
ToyViewer has some typical operations to images, such as enhancement, blur, mosaic, and so on. You can also make Aqua-button-like images, poster-like images, and more.

Custom Icon
ToyViewer can attach a custom icon to any file as well as newly saved image file.

Requirements:
OS X 10.8+
64-bit Intel