Xapian is a search engine library, scalable to collections containing hundreds of millions of documents. It's written in C++ with bindings for Perl, Python, PHP, Java, Tcl, C#, Ruby, and Lua. It is a highly adaptable toolkit that allows developers to easily add advanced indexing and search facilities to their own applications. It supports the Probabilistic Information Retrieval model and also a rich set of boolean query operators. Omega is a Web search application built upon the Xapian library. It can index a Web server's document tree (including HTML, PDF, OpenOffice, MS Word/Excel/Powerpoint/Works, WordPerfect, RTF, PS, etc.), or data exported from arbitrary sources (e.g. SQL databases).
cgi_buffer is a group of libraries that may be used to improve performance of CGI scripts (and other content generation engines) in some circumstances by applying performance-enhancing HTTP mechanisms that are typically not supported by them. Currently, Perl, Python, and PHP4 are supported. The Python library may also be used as a wrapper around another CGI script.
LanguageSys is meant to internationalize your applications. It handles the access to language files, which are based on an INI style. It is possible to precompile the language files to increase the speed of processing. This system is focused on being highly object-oriented, so it makes the language aliases aviable as member variables of the own class. It contains a system to fetch a list of all the available languages by a given directory where the language files are located. A distinction of languages is drawn as RFC1766 recommends. Examples, documentation, and a simple script to precompile your language files are included.