Just wanted to share a new image optimization app similar to perch_kraken, except it uses the Tinify API to optimize images (free upto 500/month);
It can be configured to optimize images directly when uploading or it can also be setup to run as a scheduled task. The queue list shows the image, original and optimized image file size as well as a graphical output for the % saved. There is also options to re-queue, or manually run or clean the queue as well.
Here is the GitHub repo. If you use it let me know where!