Vallen jpegger - Vallen JPegger is the international, handy, and full featured image viewer, which shouldn't be...
CodeKit - CodeKit allows you to optimize the performance of your website by automatically and efficiently compiling a variety of popular languages.
Cloudimage - Cloudimage.io is the easiest way to resize, store, and deliver your images to your customers through a rocket fast CDN.
Prepros - Compile Less, Sass, Scss, Stylus, Jade, Coffeescript, Haml and Markdown with live browser refresh.
ImageOptim - Faster web pages and apps.
Fire.app - Fire.app is a menu bar only app for dead easy HTML prototyping.