AxPoint generates beautiful slideshows in PDF format from a simple XML description format. It is written as a Perl SAX2 handler, but also ships with command line tools. The format supports slide transitions, PDF bookmarks, bullet point transitions, images, text colours, different fonts, and more.
Mechapoint is a simple presentation program for playing slide-based presentations. It uses the Enlightenment project's Evas canvas library as its backend drawing system, which provides a lot of scope for creating effects. It also uses an XML file format which is (relatively) easy to write.
makethumbs is a Bourne shell script which creates static HTML image galleries suitable for web or CDROM presentations. It is designed for portability and depends on the fewest possible helper programs. You can simply run makethumbs in a directory of JPEGs and get a usable set of web pages. If you have the time, you can add captions, descriptions, and create a dotrc file to completely change the look and feel of the generated gallery. A small helper script, rotate.sh, is also available to easily fix rotated images.
Photo Novilab is an highly customizable program written in PHP that lets you create photo galleries on your Web site simply by uploading the images. It creates a thumbnail gallery and has the capability to insert a button to send the photo link by email. It also features the ability to view how many times a picture has been viewed.
AutoScrapbook helps automate the creation and maintenance of an online photo gallery. It creates the thumbnails and Web pages for you by asking you for descriptions of the pictures. It works best when run under Linux and within X (for picture viewing), but you could use it through only a terminal and a separate browser if necessary. It can optionally allow you to delete, rename, and rotate images during the description process. It can also use the programs exif, exiftags, and/or jhead to access EXIF data from the images and/or store descriptions within the JPEG header. Note that this program creates a static Web site around existing images, using the existing directory structure as the heirarchy for the Web site.