mntd is an automount daemon and shared library written for automatically mounting hotplug devices such as USB sticks, Compact Flash cards, or other mountable devices on Linux 2.4.x and 2.6.x kernels. You only have to plug in your hotplug device and wait a little bit. The library can be used for user mode programs that want to be informed when devices are mounted and unmounted. It will use now devfs to get the device changes. So no need for hal and udev any more.
movemetafs is a searchable filesystem metadata store for Linux that lets users tag local files (including image, video, audio, and text files) by simply moving the files to a special folder using any file manager. It also lets users find files by tags using a boolean search query. The original files (and their names) are kept intact. movemetafs doesn't have its own user interface, but it is usable with any file manager.
MP3FS is a read-only FUSE filesystem that transcodes FLAC audio files to MP3 on the fly when opened and read. It is useful to enable the use of your FLAC collection with software and/or hardware that only understands MP3s. It is also a novel alternative to traditional MP3 encoder applications. Just use your favorite file browser to select the files you want encoded, and copy them somewhere.
NBD-HTTP is a user-space tool that exposes a file read over HTTP as a local block device by using the network block device support in Linux kernels. Reading data from HTTP is done when needed, with read-ahead and connection reuse. One obvious use is to mount ISO images without having to download everything ahead of time.
netview lets you browse, mount, and unmount SMB shares using any browser, but especially Konqueror or any browser which is also a file manager. It provides actual mounting of shares so you can edit files on them. It addes mounted shares to /etc/fstab automatically so they will be remounted, and manages storage of passwords in a $HOME/.smbpasswd file for later auto-mounting of shares.