ISAPI Developer's Site

Includes specifications, FAQs, source code, tutorials, consultants listing, and vendor listing. By Stephen Genusa.
http://www.genusa.com/isapi/

ISAPI Links and Tools

Links to ISAPI-compiant web servers, resources, samples, and tools related to ISAPI. By Peter Pohmann.
http://www.dataweb.de/en/support/isapi.html

15 Seconds: ISAPI

Articles, news, and links related to this technology. By internet.com Corp.
http://www.15seconds.com/focus/ISAPI.htm

DevCentral

Explains how to develop ISAPI Extensions with MFC.
http://devcentral.iftech.com/articles/MFC/isapi/default.php

ISAPI URL Rewrite Filters

A comparision of ISAPI filters that enable IIS to have URL manipulation capabilites similar to Apache's mod_rewrite.
http://www.jdhodges.com/log/1309

JspISAPI

An ISAPI DLL for IIS web server to tunnel JSP requests through IIS to Tomcat webserver running on same machine.
http://jspisapi.neurospeech.com/