WhatAMark is a great app to watermark multiple photos in one go. You can add logo or text with a customizable transparency level, background for text and rectangle, different fonts, sizes, colors, positions and use other parameters.
PhotoGUN: Batch, Watermark, Convert, Crop, Resize, Rotate, Rename, add Creative Effects and much more. Simply drag and drop a picture, a hundred or thousands of photos, to the drop-window and select operations you want to apply to them.
Ice˝ream Image Resizer is a great application for quick and effective image resizing performed by using preset profiles or manual configurations. The program offers bulk mode, drag&drop mechanism and user friendly interface.