"Tell us a little about the history of Horde and when and why it started, and how you got involved. How many developers have and are contributing to Horde?
"Horde started in summer 1998, when Chuck Hagenbuch created a Web mail system for his university. It was called IMP 1.0.0, consisted of about 1500 lines of PHP 3 code, HTML and documentation. Since then, a Web application framework, over 50 applications, two groupware suites, and 350,000 lines of PHP code have evolved. IMP still exists and has just been released as version 4.3, while we're already working on IMP 5."