From KDE Web Dev Team:
Kallery for Linux is an easy to use image gallery generator application with a wizard-like interfaces. You can create nicely looking, ready-to-publish web pages from your digitally stored images. Kallery for Linux handles a lot of image formats, automatically generates thumbnails with the help of ImageMagick, converts the images in other formats (eg. JPEG), it is possible to create descriptions for images or load them from the image files themselves, the output HTML gallery is highly configurable, uses templates for the gallery, and save and load of the project files, so you can regenerate the gallery later with the same or different settings.