Kishore made this product
Tealpod Batch Image Compressor is a all-in-one solution with RAW format converter (CR2, CRW, NEF, EFR, TIFF, PNG, BMP and PSD files into JPG or PNG). Tealpod Batch Image Compressor also has a unique feature to compare LIVE (BEFORE-AFTER) compression of the image(s).
Its pay-only-if-you like the product, so it's literally (no spyware, no adware, clean code). Its completely FREE.
It's Squash on steroids.