Apache with Secure Sockets Layer (SSL) built-in, not as a module.

A free enterprise-ready derivative of Apache.

Features support for SSL V2 and V3, Fast Response Cache Accelerator (Windows NT only) and native platform install.

Open-source Apache implementation for Windows.

Apache adapted to work with Oracle's Internet Application Server.

Apache redesigned with rigid security features.

Apache rewritten to serve pages written in the Stratos programming language.

Apache-based web server for MacOS Classic (9.x and below).