mesclar
A tool for batch watermark/banner image merging
...Supports many different image formats, such as jpg, gif, png, bmp and many others (all formats supported by the ImageMagick library).
Watermark an entire directory of images with a user-friendly and very easy to use graphical interface!
It takes only 5 steps:
1. Select source directory
2. Select watermark/banner image
3. Select destination directory
4. Set merging attributes (size/position)
5. Click Start and go have a coffee
Pay attention to the project requisites!
You have to install the .NET Framework 4 and ImageMagick for this software to work properly.
You can find the download links for those projects at this project's website (http://lojaaffinita.com.br/mesclar).