Search Engine Land, Tom Demers: “…As Kristine Schachinger points out in her excellent article on image optimization, resizing and compressing images can often be the easiest and highest-impact action for speeding up pages on your site. Schachinger does a great job of outlining image compression and resizing best practices, but once you know which images need work (or if you just have some new images to add to your site), what’s the best tool for actually compressing images? Since image compression can be such an easy win, I wanted to test the capabilities of five different free, standalone image compression tools that writers, designers or marketers can use to ensure that they’re keeping their image file size in check…”