FileHandle::Unget is a Perl module which is a drop-in replacement for FileHandle. It allows more than one byte to be placed back on the input. It supports an ungetc(ORD) which can be called more than once in a row, and an ungets(SCALAR) which places a string of bytes back on the input.
FileLister is a filesystem indexing tool with a Web based frontend. Running platformindependently in a Web environment, its goal is to easily find files in large archives, using a rich set of search configuration options. Additionally, you may download single files or even create and download zip files on the fly from the results of your search.
FileType is a file type detection engine written in C. It will appeal to coders looking for functionality similar to that provided by the 'file' command. FileType is compact (less than 20K binary), efficient, and very portable. FileType is part of the family of software created from the commercial Xamime email filtering project.
Filelight graphically represents a file system as a set of concentric segmented rings (or nested piecharts), aiming to show where disk space is being used. Segments expand from the center, representing files and directories. The size of segments is proportional to the size of the files they represent. Directories have child segments which represent the files they contain. Filelight performs a similar function to the command line tool du, but all the information is shown in a compact graphical fashion.
Finnix is a small, self-contained, bootable Linux CD distribution ("LiveCD") for system administrators, based on Debian testing. You can use it to mount and manipulate hard drives and partitions, monitor networks, rebuild boot records, install other operating systems, and much more.
Fosfat is a C library for providing read-only access to a Smaky formatted disk. Currently, only a tool and a FUSE extension that use this library can be used for reading a directory and copying a file. Smaky is a system developed in Switzerland at the EPFL (Ecole Polytechnique Fédérale de Lausanne).