CGIWrap is a setuid wrapper that allows users to install and execute their own cgi scripts that get executed as their own userid. Much of the idea of suexec came from CGIWrap, however, cgiwrap stands on its own, and works with all web servers. CGIWrap must be installed by a system administrator, but after that, users can do their own web scripting.
The HTML Pre-Processor is a perl5 script that does basic including, #defines, and assertions for HTML, much like cpp(1) does for .c source files, but it is lacking a lot of cpp's features (and internal complexity). HPP is useful for simple site includes and conditionals on sites that do not have SSI or where its useful to have pages "pre-compiled", and may be useful just to do a unified look n feel throughout your pages.
DeleGate is a multi-purpose application level gateway or proxy server that mediates communication of various protocols, applying cache and conversion for mediated data, controlling access from clients, and routing toward servers. It translates protocols between clients and servers, converting between IPv4 and IPv6, applying SSL (TLS) to arbitrary protocols, merging several servers into a single server view with aliasing and filtering. It can be used as a simple origin server for some protocols (HTTP, FTP, and NNTP).
txt2html is a Perl program that uses the HTML::TextToHTML perl module to convert plain text to HTML. It supports headings, lists, tables, simple character markup, hyperlinking and is highly customizable. It recognizes some of the apparent structure of the source document (mostly whitespace and typographic layout) and attempts to mark that structure explicitly using HTML.