ShowImg is a feature-rich image viewer which can display numerous formats, including JPEG, PNG, GIF (animated) and MNG. It consists of a tree view frame, a directory/preview frame, and a view frame. The (larger) view frame can be exchanged with the (smaller) directory/preview frame. It can preview and display images from multiple directories and search for identical images. ShowImg also features a full-screen mode, zooming, sorting, drag'n'drop with Konqueror, and support for images in compressed archives (.zip).
GLiv is an OpenGL image viewer. Image loading is done via Gdk-pixbuf bundled with GTK+-2.6, rendering with OpenGL, and the graphical user interface uses GTK+ with GtkGLExt. GLiv is very fast and smooth at rotating, panning, and zooming if you have an OpenGL accelerated graphics board. It supports thumbnails and navigating through them using two images menus.
Tof is a Web-based photo album. It is based on slooze, and additionally has viewing rights, picture rating and sorting by rate, indexing with keywords, picture upload through the Web, thumbnail creation, and multiple languages support. It is being developed with PostgreSQL, but should be easy to port to MySQL thanks to phplib.
IIViewer is an application for X, and optionally for the Linux framebuffer device. It allows you to display pictures in a directory as thumbnail images. Selected images can then be displayed at full size. It reads BMP, GIF, and JPEG images (even without additional libraries), but it is also able to use libjpeg, libtiff, and libpng.
KuickShow displays images using all available space, without wasting it with bars or menus. It also has smart automatic zooming which scales images according to size. You can use the integrated file browser to choose images, or navigate through a folder with the mousewheel or the keyboard. It also has fullscreen view and slideshow, and supports a wide range of image formats.
MDVI is a library and a previewer for DVI files with the output format of TeX. The previewer runs on the X Window System, but the library can be used in any environment, and supports fonts in PK, VF, GF, Type1 and TrueType formats, and font metric files in TFM, OFM and AFM formats.
Gallery is a slick Web-based photo album written using PHP. It is easy to install, includes a config wizard, and provides users with the ability to create and maintain their own albums in the album collection via an intuitive Web interface. Photo management includes automatic thumbnail creation, image resizing, rotation, ordering, captioning and more. Albums can have read, write, and caption permissions per individual authenticated user for an additional level of privacy.
iPhotoAlbum is a dynamic online photo album program written in PHP. iPhotoAlbum that has a sleek design and has a whole slew of features included. The feature list includes support for spaces, multi-level photo folders, customized info panels, smart picture sizing, quickemail, quicklinks, and an advanced photo album navigator. It also has Picture Stats (size, width, height, type).