mod_pointer is an Apache module for making domain redirects easy. The configuration part of the mappings are handled in either a MySQL or Postgresql database, or in a NDBM or SDBM db file, which makes it it easy to build a web-based interface for letting users change it on their own.
mod_sequester is a module for the Apache Web server 1.3 which allows you to control access to Web documents according to the date and time of the request. It provides four basic ways to control access: allow until time t, allow after time t, allow between times t and t', and allow except between times t and t'. It is useful for controlling access to time-sensitive things like press releases (disallow until after), special offers (allow until), or windowed 'this week only' opportunities (allow between).
mod_sphinx is an Apache module which intercepts output bound for the client, whether it be from files served by the same Web server, files sent via reverse proxying, or files delivered by transparent forward proxying (outbound proxying, as in your browser's proxy setting). It opens the text and replaces a word with another word or phrase. When in regular proxy mode, it cannot modify SSL content since Apache cannot decrypt that (it would be a protocol violation).
Mod_trace_output is an Apache module that is designed to store the data that was sent to a browser, even if the request was for a dynamic page. It is possible to use it to generate statistics on the content viewed by users, and can store captured pages in files or in a MySQL database.
mod_vhs is an Apache 2.2+ Web server module allowing mass virtual hosting without the need for file-based configuration. The virtual host paths are translated from any database supported by mod_ldap or mod_dbd at request time from MySQL, LDAP, PAM, or a system password file. PHP security can be basically auto-configured from the database using this module. Requests are cached by mod_ldap when configured.
The neteye actioncache is an extension to the Jakarta struts framework. It is intended for projects that use struts to display data provided by content management systems. Actions (and views) that display the content are only invoked when the underlying data has changed. Time-expensive operations like data retrieval, JSP processing, or XSLT transformations are only performed when needed.