Cymbeline is an Python application server framework that includes functionality such as database and arbitrary object pooling, Web servers (including SSL), a persistent object repository, and a text console. It was originally designed as an administrative shell for an embedded system, but has since morphed into a more general purpose, run anywhere toolkit.
GeneWeb is a system for people who want to publish their genealogy data on the Web. It can also be used locally (not connected on the net) as a normal genealogy program. It uses very efficient techniques of relationship and consanguinity computing, speaks several languages, and can run in conjunction with an existing Web server (CGI) or standalone using its own internal server.
Schroedinger is the combination of Apache Tomcat with a nice, clean Swing GUI. It provides an easy way to create and test JSP and Servlet Web applications. It records every JSP/HTTP activity so that every possible bug can be corrected immediately. Schroedinger can be used in personal mode, which prevents others from using its JSP Server while you develop the application. Alternatively, Schroedinger's working directory can be opened via file-sharing, so that a JSP can be copied to any computer of the JSP development team.
Xerver is a fast, tiny Web server which allows you to run CGI scripts (Perl, PHP, etc.), create aliases (virtual directories), allow/deny directory listings, create your own error pages ("404 Not Found"), allow/deny CGI scripts, password protect folders, choose your own index file extensions, share/unshare hidden files or files with certain file extensions, share unlimited folders, etc. It supports HTTP/0.9, HTTP/1.0, HTTP/1.1, and all HTTP methods (GET, POST and HEAD).