Watermark.ink - Online Photo Watermarker
PhotoPenguin App - PhotoPenguin is a completely free batch photo editor with support for cropping, resizing, adding watermarks, and converting photos to other formats. It works on the user's device, using the capabilities of modern browsers.
Watermark - Watermark is an online tool to watermark content and copyright protect photos, videos, and documents.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
textmark - Protect your content with an invisible, trackable watermark.
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats