Tagsistant is a semantic filesystem for Linux and BSD kernels. It uses directories as tags and allows file tagging by simply putting files inside desired tag directories. The path you are walking by is your query, e.g. tagsistant/tag1/AND/tag2/OR/tag3/AND/tag2/. Being a low level interface, a filesystem can be instantly used by shell users, file managers, or CGI. A plug-in architecture is under development to add autotagging functionality for common files like .mp3, .ogg, .jpeg, .html, and .xml. A transparent ontology engine is also under development to allow users create a relationship schema between directories.
Paperbox is a document browser. It lets you nicely view your ebooks, office and text documents and organize them by tags. Relying on Tracker, it is able to instantly discover all documents on your desktop and present them in a convenient way. Tags and other metadata are shared across all Tracker-based applications.
VFSJFileChooser is a Java Swing component that allows you to browse both remote and local filesystems. It is based on the Apache Commons VFS library. It can replace the standard Java JFileChooser in applications that need to access remote files. It supports all the protocols available in Commons VFS: FTP, FTPS, SFTP to access files using SSH, SMB to browse Windows/Samba shares, HTTP, and HTTPS.
Cruiser places an icon in your system tray that activates a recursive menu system. The initial purpose is to allow you to browse your filesystem. Cruiser is also designed to be extended with plugins using D-Bus, so it can take on many different roles. It is possible to write plugins to provide quick access to RSS feeds, bookmarks, email, weather, stock quotes, and more.
Vimv is a utility to help rename various files at once using a text editor. It opens the list of files in a directory inside a text editor (vi by default). Then, any changes made in the editor will be reflected in the filesystem (the files in the directory will be renamed to the names saved in the editor).