NetNewsWire

DaisyDisk scans your disks and presents their content as interactive maps where you can easily spot unusually large files and remove them to get more free space.<br />
<br />
Like WhatSize.

expod is a small utility for getting songs off your iPod.

Airlock allows your Mac to lock itself, plain and simple. Using your iPhone or iPod Touch, Bluetooth, and a smidgen of pixie dust, Airlock determines whether you're near your computer. When you leave the room - poof! - your Mac locks itself.

Pod to Mac is freeware that lets you copy or transfer music, videos and playlists from an iPod or iPhone to your Mac and into iTunes.

Duplicate Files Searcher is an application for searching and deleting duplicate files on your computer. It is a platform-independent application.

"SoundSource": SoundSource is a tiny tool for OS X enabling you to switch your audio input and output sources with a single click, and even adjust their volume settings. -- "LineIn": LineIn is a simple application for OS X to enable the soft playthru of audio from input devices. In simpler terms, you can use LineIn to play sound coming in through a microphone or any other device plugged in to your Sound In port, just as was once available with OS 9's "Play input through output device" option.

WeatherCal presents the latest available weather conditions and forecast (up to five days in advance†) for your desired locations, as all-day events in iCal. Through: http://daringfireball.net/linked/2009/03/18/weathercal

Paparazzi! is a small utility for Mac OS X that makes screenshots of webpages.

This is a free program for Mac OS 10.4 and later that lets you search for files on your disks, primarily on HFS formatted ones.

Contrary to Spotlight, it does not use a database but instead uses the file system driver's fast search operations.

This lets you search for file properties such as name, dates, size, etc., but not for file content (use Spotlight for that)!