Shrink Me - Compress images with one drag / click
Watermark.ink - Online Photo Watermarker
TinyJPG - Compress JPEG images with perfect quality and file size
Watermark - Watermark is an online tool to watermark content and copyright protect photos, videos, and documents.
Aerate for macOS - Ridiculously good lossless image compression
textmark - Protect your content with an invisible, trackable watermark.