1T3XT offers a suite of products that are useful to create and/or manipulate documents, more specifically PDF and RTF documents. There's some support for XML and HTML, but this isn't the core business of iText.
`ABL' is a basic flexible abstract list library defined using C preprocessor. It allows you to define linked lists of arbitrary types very easily. You also can use it as stacks and queues. You can easily define complicated types like list of lists etc.
Lily is a Firefox add-on that allows users to create rich, complex applications in a web browser. With Lily it's possible to make programs that mashup the web or the desktop, visualize and animate data, modify webpages, play music, or connect to world outside the computer.