Most interesting in File Managers

Free
Helps you find any file or folder you need within your Mac in just a few moments
Disk Doctor will free up disk space by removing cached and unneeded files from your hard drive.
Analyze disk space usage and spot the files that take up the most space.
Disk Inventory X is a disk usage utility designed for Mac.
Free
A disk space analyzer, system accelerator and cache cleaner.

Top rated in File Managers

Nude
Free

Nude is an Objective-C (non-unix) utility to remove .DS_Store files.

DriveMonitor
Free

Is a smart tool that helps you see the status of the volumes mounted in desktop.

SunnyMenu
Free

The perfect compliment to the dock.

FinderWindow

A useful addition to the Finder window toolbar.

Bigasoft iPod Transfer
Free

Bigasoft iPod Transfer is a nice backup utility for the Mac.

Chimp

View all those pesky CHM files that are floating around.

AppleOff

Scanning - Automatically scans folders to remove the following files: .DS_Store, ._, .Trashes.

myLicenses

Secure and Portable License Collector (was Lizenzen) Store, track and mange your licenses.

TunesBar

See what you're hearing There's no reason a user should be forced to open iTunes' window and decipher the complex interface and sort through all...

FinderCleaner
Free

FinderCleaner cleans hidden files the Finder creates.

OnArtwork
Free

It captures CD covers and assigns them to your iTunes tracks.

bildeR

Aperture and all the others are great applications to store and manage your pictures...

Rename Now Platinum
Free

Rename Now renames batch files and folders innovatively for Mac users.

Skooby Micronamer
Free

It is a handy little doohickey for changing the renamer tools options.

DMG Enabler
Free

DMG Enabler is a droplet that converts standard disk images

SortServicesX
Free

Is a small application which adds the paragraph sort menus to the Services menu

Magic Launch Agent
Free

With Magic Launch you can write your own launch rules.

Change Finder

Platypus-wrapped scripts to change the Mac OS X Finder to display hidden files and a script to return Finder to normal mode.

plist Helper

Simple application that converts binary format .plist files to human-readable xml format.

Xstrings
Free

Great gems can be hidden in executable and other binary files.