ImageAlpha
ImageAlpha is a GUI for pngnq and pngquant. It allows you to easily generate paletted PNG images with full alpha channel. These images are usually 40-60% smaller than 24-bit PNG, and still can have semitransparent colors.
Tinybeest
A Mac app and Chrome extension that optimizes/compresses images and PDFs. Tinybeest also converts file formats and resizes ima ...
SqueezeFile
Works with all common image formats like png, jpeg, bmp, tiff and Microsoft Office documents pptx, docx, xlsx.
Optimage
Optimage is an advanced image optimization tool to automatically reduce file size of your images and documents by up to 90% wi ...
Pitchi
Pichi for Mac is the best and quickest tool for optimizing and resizing your images individually or in batches.
The fastest wa ...
Black Bird Image Optimizer
Optimize pictures without quality lossless. With Black Bird Image Optimize - you can reduce the size of your photos several ti ...
ImageOptim
ImageOptim is excellent for publishing images on the web (easily shrinks images “Saved for Web” in Photoshop). It's useful for ...
Color Quantizer
Color quantizer is a small program allows you to easily optimize images for web. Key features: • Converting to an arbitrary ...
RIOT - Radical Image Optimization Tool
Saving images for web/email/other media with the best compression ratio and quality is a difficult task if you don’t have the ...