Open Source C File Managers for Mac

Fpart is a tool that helps you sort file trees and pack them into bags (called "partitions"). It is developped in C and available under the BSD license. It splits a list of directories and file trees into a certain number of partitions, trying to produce partitions with the same size and number of files. It can also produce partitions with a given number of files or a limited size. Once generated, partitions are either printed as file lists to stdout (default) or to files. Those lists can then be used by third party programs. Fpart also includes a live mode, which allows it to crawl very large filesystems and produce partitions in live. Hooks are available to act on those partitions (e.g. immediatly start a transfer using rsync(1)) without having to wait for the filesystem traversal job to be finished. Used this way, fpart can be seen as a powerful data migration tool.

fbreak is a console application that allows you to break a large file into multiple smaller files (ie, for distribution on floppy disks).

A library with the intent to provide a single interface to files and data in various locations, like inside archives and across the internet.

Idas (I Don't Accept Seconds) is a high-performance duplicate file detector. Idas plugs into your favorite Unix filter and can tell you exactly which files have been seen before, regardless of whether or not it appears with the same filename.

The nmSync tool provides file synchronization among different platforms (Win32, OSX, BSD, ...) in networked or disconnected environments.