Thousands of Delphi add-on components and tools are available on the market, ranging from simple freebies to large open-source projects, from shareware programs to highly professional components. This appendix provides a list of notable open-source projects I've mentioned elsewhere in the book.
Delphi 7 includes the source code for two notable open-source projects:
Internet Direct (Indy) This project is covered in detail in Chapter 19, "Internet Programming: Sockets and Indy." The official website for Indy is Chapter 22 ("Using XML Technologies"). Refer to www.philo.de/xml for updates and more information. Support for Open XML is available on a mailing list you can sign up for on the website.
Delphi also includes a third open-source project: the ZLib compression library, covered in Chapter 4 ("Core Library Classes"). It isn't listed here because it is not Delphi based.