Open Source HTML

HTML Tidy Library Project
A quorum of developers have pitched in on a Source Forge project to maintain and further develop Dave Raggett's excellent HTML Tidy program. We have two primary goals. First, to provide a home where all the patches and fixes that folks contribute can be collected and incorporated into the program. Second, a library form of Tidy has been created to make it easier to incorporate Tidy into other software.
Tidy is able to fix up a wide range of problems and to bring to your attention things that you need to work on yourself. Each item found is listed with the line number and column so that you can see where the problem lies in your markup. Tidy won't generate a cleaned up version when there are problems that it can't be sure of how to handle. These are logged as "errors" rather than "warnings".
Open Source HTML Parsers in Java
NekoHTML is a simple HTML scanner and tag balancer that enables application programmers to parse HTML documents and access the information using standard XML interfaces. The parser can scan HTML files and "fix up" many common mistakes that human (and computer) authors make in writing HTML documents. NekoHTML adds missing parent elements; automatically closes elements with optional end tags; and can handle mismatched inline element tags.
Open Source Search Engines
Open source search engines allow participants to make changes and contribute to the improvement of the software. They are generally free and use the GPL or other open source licensing schemes. In most cases, anyone can use the software on a site or incorporate it in a product, but must share improvements and additional functionality with the other source users. Technical support is generally only available from other users and developers via mailing list or online conferencing, or by paying consultants.
Economic Paradigm of Open Source
Open Source developers have, perhaps without conscious intent, created a new and surprisingly successful economic paradigm for the production of software. Examining that paradigm can answer a number of important questions. It's not immediately obvious how Open Source[1] works economically. Probably the worst consequence of this lack of understanding is that many people don't understand how Open Source could be economically sustainable, and some may even feel that its potential negative effect upon the proprietary software industry is an overall economic detriment. Fortunately, if you look more deeply into the economic function of software in general, it's easy to establish that Open Source is both sustainable and of tremendous benefit to the overall economy.
Producing Open Source Software
This book is meant for software developers and managers who are considering starting an open source project, or who have started one and are wondering what to do now. It should also be helpful for people who just want to participate in an open source project but have never done so before. The reader need not be a programmer, but should know basic software engineering concepts such as source code, compilers, and patches. Prior experience with open source software, as either a user or a developer, is not necessary. Those who have worked in free software projects before will probably find at least some parts of the book a bit obvious, and may want to skip those sections.