PostgreSQL File Finder is an alternative to the locate/updatedb commands found in most Linux environments. It searches the filesystem for all files and directories and stores that information in a PostgreSQL database. It can also collect file lists from other hosts, giving you the opportunity to search for files on several hosts using the same command.
fsdb speeds the creation of slocate's database files by keeping its own database and updating only those parts that need to be updated. It connects to a daemon to receive the updated inodes. In turn, the daemon interfaces with a kernel module which hooks into Linux's dnotify mechanism.
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.