Piwigo is an opensource web application to manage and share a pictures collection. with ploader, you can easily upload pictures to your piwigo gallery, and do some management tasks, without having to use the web interface.

features:
- easy editing of pictures properties (title, description, privacy, tags)
- ability to specify pictures upload size and orientation.
- large picture preview.
- drag-and-drop support from other applications.
- create categories
- watermarking