Smart Resize is a blazing fast bulk image resizer based on HTML5, it can intelligently "see" which part of an image is the most visually appealing region and automatically crop it to your target size, it can also detect human face as keypoint in an image, this is very useful and convenient when do batch resizing images. Completeley free
picdiet is a free, fast and powerful image compressor written in javascript, which means all images compression are processing in your local browser, no need to upload to the cloud server, so it's fast and safe. Also it's unique javascript algorithm have better performance than jpegoptim, jpegtran, jpegrescan and jpegmini
