Hijinks Inc.

[ Browser ]
Firefox - Need I say anything else? My browser of choice no matter what OS you’re running.

[ RSS ]
Vienna - An excellent RSS reader

[ Email ]
Thunderbird - Mail.app is a fantastic email client, but Thunderbird still outshines it. Truth be told though, I hardly use my desktop email client.
Google Notifier - If you use Gmail this application is a must have. Automatically checks your Google Calendar and Gmail account and notifies you of upcoming events and email messages.

[ IM ]
Aduim - A feature rich Instant Messaging client, with a broad range of supported clients makes this a must have.

[ File Sharing ]
Transmission - A simple, easy to use BitTorrent client that’s a little more developed than Tomato.

[ FTP ]
Cyberduck - A departure from the normal two paned view you might be used to in FTP programs, but still a robust program with support for FTP (File Transfer Protocol), FTP/TLS (FTP secured over SSL/TLS) and SFTP

[ Video Playback ]
VLC Player - Fast, stable and wide ranging codec support makes VLC a fantastic all around media player
Flip4Mac - Adds support for playing WMV files in QuickTime

[ DVD Ripping ]
Handbrake - It may not offer the widest range of options when ripping a DVD, but it’s straight forward and produces high quality rips with no hassle.

[ CD Burning ]
LiquidCD - Excellent alternative to the native disc burning in OS X

[ Finance ]
Cashbox - Simple and easy to use software to keep track of your finances

[ Misc ]
smcFanControl 2.1 - A must have for managing the fan speeds on your Macbook / Macbook Pro
Growl - Growl is a notification system for Mac OS X: it allows applications that support Growl to send you notifications.
Alarm Clock 2 - I would be late for work/classes almost daily if it wasn’t for this program, with options for waking up to either an annoying klaxon or music from your iTunes library.