graphviz is a set of graph drawing tools and libraries. It supports hierarchical and mass-spring drawings; although the tools are scalable, their emphasis is on making very good drawings of reasonably-sized graphs. Package components include batch layout filters and interactive editors for X11, Java, and a TCL/tk extension. The batch filters can be configured as a web visualization service (using GIF and click-maps). Typical applications include display of finite state machines, software diagrams, database schemas, and communication networks.
Ilib is an image manipulation library for developers. It's capable of reading and writing images (PPM/PGM, PNG, JPEG, GIF, XPM, BMP) and many drawing functions including drawing lines and text using any BDF (X11) font. It's great for generating GIFs/PNGs from a CGI or generating graphs. Ilib includes sample applications for generating graphs for HTTP access.log files and QuakeWorld server frag log files and a tool for creating image indices from a group of images.
im2html walks a directory hierachy filled with categorised images and makes HTML indices and thumbnails for everything. It's easy to customise the titles of each page, add descriptive HTML for images or the page as a whole, add references to related web pages etc. It's incremental, so you can run it nightly in a cron job to keep things up to date, reducing most maintenance to "copy the image into the right subdirectory and wait overnight". It's careful to not rewrite index files unless their contents change, making maintenance of a remote gallery from your master copy with a tool like rsync efficient.
The Image::Size module for Perl provides a clean interface for fetching image dimensions (and type, when unknown) from graphics files in a wide variety of common formats. It is a pure Perl extension (no C or XS linking required) that has been tested on a variety of UNIX, Linux and BSD systems, as well as MacPerl and Windows ports of Perl. It was designed around and tuned for use in CGI application development, but is useful in other areas as well.
LiveFrame Gallery is an easily-customized photo album and slideshow application. Its interface focuses your user's attention on your photographs, not on navigation, allowing them to easily click through sequentially, select from thumbnails, or view an automated slideshow. Users can select from up to five different image sizes to view, based on their display size and network connection. All pages are template based, allowing you to easily customize the entire interface.
OIO is a Web-based metadata/data management front-end which is built using Zope and works with Postgresql. No programming is required to build and manage Web-forms or to perform data mining/analysis on the collected data. It is in production at the Harbor/UCLA Medical Center for clinical outcomes management and research data. Forms created with OIO and hosted on any OIO server can be downloaded as XML files. Once downloaded from the "Forms library" and imported into an OIO server, the necessary database tables are automatically recreated and the imported forms become immediately available to the users of that OIO server.
PLOTICUS is a command line utility for creating bar, line, pie, boxplot, scatterplot, sweep, heatmap, vector, timeline, Venn diagrams, and other types of charts and plots. ploticus is good for automated or just-in-time graph generation. It handles date, time, and categorical data nicely, and has some basic statistical capabilities. It can output to GIF, PNG, SVG, SWF, JPEG, PostScript, EPS, and X11. You can use convenient preset options or create complex scripts with rich and detailed color and style operations.