Searching

Chestnut FTP Search
An open source web application to search for files on FTP servers. Includes screenshots, documentation and an online demonstration. By Konstantin Korikov.
http://lostclus.linux.kiev.ua/Projects/Chestnut_FTP_Search

FileSearching
Search engine for files on ftp servers worldwide, thematic search for music, images, video, hardware drivers.
http://www.filesearching.com/

FileWatcher
Provides a directory, an advanced search tool and an experimental feature that allows users to search the content of tarball packages.
http://www.filewatcher.com/

Global File Search
Automated FTP search engine. Provides the number of indexed computers, folders and files.
http://www.globalfilesearch.com/

Mamont
Provides a simple interface and allows users to restrict their searches to servers located in a list of countries.
http://www.mmnt.ru/int/

MetaFtp.com
Offers advanced search options and checks the availability of files before providing the ftp link along with detailed information.
http://www.metaftp.com/

Napalm FTP Indexer
Provides advanced search filters. Registered users may also suggest servers which will be automatically indexed.
http://search.ftphost.net/

National Technical University of Athens: FTPSearch
Hosts a copy of this open source search engine software for FTP servers. Knowledge about perl, ANSI C and shell scripts is required when installing it.
ftp://ftp.ntua.gr/pub/net/ftp/ftpsearch/

PubFTP
Automated search engine which offers the possibility to send search results to users' e-mail addresses upon request. A subscription based extended access is also available.
http://www.pubftp.com/