PDFMap is a command line tool and Python library which eases the creation of very high quality maps in PDF format. You can place objects on the maps. Each object can be represented by either a shape or an image, and is scaled and rotated to reflect its original dimensions and orientation. You can make each object clickable in Adobe Acrobat Reader (e.g., to access a Web-enabled application from which you've extracted the data used to create the map).
IsaViz is a visual environment for browsing and authoring Resource Description Framework (RDF) models represented as graphs. It features a 2.5D user interface allowing smooth zooming and navigation in the graph; creation and editing of graphs by drawing ellipses, boxes, and arcs; RDF/XML, Notation 3 and N-Triple export; and also SVG and PNG export.
Instant Picture Creator is a wrapper to produce images on demand for Web sites. It has filter management, and it's possible to add new filters. It can cache filtered images, works independently (no backend is needed), and is easy to integrate with existing Web sites. It includes two basic filters for resizing images and manipulating colour palettes. Currently it supports PNG, GIF, and JPEG.