Website Grader - Grade your website's strengths and weaknesses in seconds.
Resizing.app - Image resizing has never been so simple with free online resizing.app. Convert, optimize, resize images with ease and for absolutely free.
PageSpeed Ninja - One-click page speed boost for WordPress
Squash 2 for Mac - The easiest way to compress and optimize images for the web
WebSite Auditor - The techie's SEO spider: find site issues other tools miss
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.