mod_layout is an Apache module that provides both a Footer and Header directive to automagically include output from other URIs at the beginning and ending of a Web page. It can be used to wrap documents for a standard look and feel for a site (or to insert banners on any given document in a site). Currently known to support mod_perl, PHP and Apache JServ. Should support just about any type of handler.
Mod_auth_kerb is an Apache module designed to provide Kerberos user authentication to the Apache web server. Using the Basic Auth mechanism, it retrieves a username/password pair from the browser and checks them against a Kerberos server as set up by your particular organization. It also supports mutual ticket authentication, although most browsers do not support that natively.
MaxiWeb is a toolkit that helps you build standalone self-launching Web server applications. The toolkit includes example programs, a C++ class library, an Active Server Page compiler, and various command line tools. Programs built with the MaxiWeb toolkit can take the place of larger Web servers such as Netscape Server, Apache, and Microsoft IIS. Using the Active Server Page (C++ ASP) compiler and 5 lines of C++ code, you can Web enable your new or existing application in just minutes. Complete MaxiWeb enabled applications can be as small as 60K.
Webfs (a.k.a. webfsd) is a simple HTTP server for purely static content. You can use it to serve the content of an FTP server via HTTP, for example. It can also be used to quickly export some files by starting an httpd server in a few seconds, without editing config files first. It knows how to use sendfile() on linux and FreeBSD. There is also sendfile emulation code which uses read()+write() and a userland bounce buffer; this allows one to compile and use webfs on systems without sendfile(). The stripped binary is less then 32Kb, making it great for floppy distros, recycled hardware, embedded systems (cramfs/romfs/flash disk) and other resource-limited environments.
WebCit is a Web-based, AJAX-enabled frontend to the Citadel groupware/collaboration system. It is an attractive Web middleware layer that allows user-friendly access. By combining WebCit and Citadel, you can have a versatile online environment with many users concurrently accessing the same system using the user interface of their choice (text, Web, or downloaded client software).
LeanWeb is a tool for removing user-defined parts from Web pages. It works as a HTTP proxy, as such can be combined with other proxies, and runs on the same platforms as Junkbuster (i.e. Unix and Win32). LeanWeb is mainly intended for users of handheld devices who want to view Web pages without having to scroll through all the unnecessary clutter present on modern Web pages, but can also be used to customize frequently visited Web pages.