Haystack is a powerful tool designed to enable each and every individual manage all of her information in the way that makes the most sense. By removing the arbitrary barriers created by applications that only handle certain information "types", and recording only a fixed set of relationships defined by the developer, users can define whichever arrangements of, connections between, and views of information they find most effective. Such personalization of information management will dramatically improve your ability to find what you need when you need it.
Doodle is a desktop search engine for Linux. It searches your hard drive for files using pattern matching on meta-data. It extracts file-format specific meta-data using libextractor and builds a suffix tree to index the files. The index can then be searched rapidly. It is similar to locate, but can take advantage of information such as ID3 tags. It is possible to do full-text indexing using the appropriate libextractor plugins. It also supports using FAM to keep the database up-to-date.
Red-Piranha is a search system that can actually learn what you are looking for. It can be used as a Web page, command line, or XML-WebService, so it will work with most languages, including Java, Perl, C#/.NET, and PHP. It includes learning abilities for the Desktop/Internet search functionality. All feedback from the user is stored in (editable) XML and RDF, and is used by the system to improve the quality of searches.
Strigi is a desktop and indexer independent desktop search engine. Its main features include very fast crawling, a very small memory footprint, no hammering of the system, and pluggable backends (currently clucene and hyperestraier was provided). Communication between the daemon and search program is done over an abstract interface which is desktop independent. A small Perl program with an example of how to query the database is included along with an example KDE client application and a KIO interface.
Lobotomy involves many sub-projects oriented to experimentation about new design for human-computer interaction and, more generally, a new way for home computing. It involves a relational filesystem, a window manager, and many libraries, tools, and daemons to automatically extract and handle metadata.
The McNucle server software turns your Mac into an easy to use fileserver. Choose a file, generate the link, and send it to your friends. Your folder is presented to them in a handy Web page. You and your friends can now browse, preview, and download the files on your Mac from any Internet-enabled computer. Since you don't upload files up front, the amount of files you can present is virtually unlimited.