Shrink Me - Compress images with one drag / click
Website Image Speed Test - Beautiful & easy free analysis of the images on your page
TinyJPG - Compress JPEG images with perfect quality and file size
Pingo - Optimize images for the web quickly 🖼️⚡
Aerate for macOS - Ridiculously good lossless image compression
Pixpie - Optimize your images and speed up your site on WordPress