WideImage is an object-oriented PHP image library, written in PHP5. It uses GD2 and promotes ease of use and extensibility. It supports all common image transformations, such as resize, watermark, crop, draw text, ...
img2xhtml is a little and fast ansi C program that converts images (jpeg for example) into plain xhtml files, that draws the image using html elements to draw the divs, there is no difference between the original image and his xhtml version.
MyGraph is a easy-to-use library to draw graphs using data stored with MySQL database. The goal is to insert graph in HTML page with very few code, just selecting scales and the graph type.
FormMaker is a Java program that allows users to draw form fields on top of an image and output PHP and Javascript code for web-based forms. Easily turn paper forms into online forms.
Hayta-UML is a Web2.0 UML tool, that allows users to draw UML diagrams. A core design decision is to have a native version-control inside the application.