just ripped this off of demonoid...
Communication
Adium - multi protocol instant messenger, open source. Very customizable.
Cocoalicious - desktop Del.icio.us client.
Colloquy - basic open source IRC client
Fire - multi protocol instant messenger, open source. Simpler than Adium but also less customizable.
iChat Streaming Icon - replace your iChat picture with an animation or stream from your webcam
Macirssi - advanced IRC client, requires command line configuration
Mercury Messenger - MSN client
Proteus - multi protocol instant messenger.
XChat Aqua - intermediate IRC client, port of X11 application
Miraclesight-screensaver integrated with iSight
MenuShade & PSP Ware a easy on the eye @ night time & PSP Sync utility
Snak IRC 4 Mac
Postfix Enabler Set up a roving SMTP server + more. Send mail wherever you are with your favorite mail application. Essential for travelers and other laptop users who don't want to use webmails.
Games
http://mac.the-underdogs.org/abandonware,Anybody remember Sim Life, the Secret of Monkey Island? Mac Garden has it all.
SNES9X - SNES emulator
Star Control 2 - really old game, open source
PCSX PSX emulation 4 mac
MacMAME Multi Arcade Emulation
GamePadCompanion Sync up that Game console pad to your Mac
Graphics
Blender 3D - open source 3D modeling
freePhotoConverter - converts, shrinks, rotates photos.
Iconverter - Icon format manipulation tool with batch processing.
FontexploererX
HB Image Processor - to crop/resize a image
Interface Mods
A-Dock - displays the currently open applications in a Dock look-alike.
Desktop Manager - use multiple desktops and switch between them.
MenuMeters - displays cpu, memory and hdd use as well as network throughput in menubar
PathFinder - Finder, on steroids
Quartz Desktop - make Quartz 3D compositions your desktop
QuickSilver - like Apple's Spotlight, only faster and more adaptable
SMARTReporter - simple menu indicator to report a disk's SMART status
Visage - run a screensaver as a desktop background, change login background and customize various system messages
XMenu - customizable application menu for the menubar
TransparantDock Pimp your Dock
Themepark Free GUI designer for OSX
Internet
AcidSearch - add all kinds of searches to your Google box in Safari. Incredibly customizable.
Cyberduck - open source FTP/SFTP app
DownloadComment - puts the URL of all Safari downloads into the Finder comments field.
FTPeel - FTP client
GmailStatus - displays your new Gmail messages in the menubar
Little Snitch - selectively block applications from accessing the internet to keep them from phoning home
Sogudi - Safari add-on allowing use of short cuts and reads Unix manual pages.
XyleScope CSS Tool/Browser
BBEdit Pro featured Web Design Text editor
Music/Media
Barquee - menu bar iTunes controller/display
ByteController - control iTunes from the menu bar or with shortcut keys
DockArt - replaces the iTunes Dock icon with album art for the playing track
Fetch - FTP app
iPodRip - supports recovering songs and playlists from an iPod,playback of audio files and much more
JHymn - decrypt AAC files from the iTunes Music Store without loss of audio quality.
MacTheRipper - freeware DVD ripper
Pod Manager - extract songs from your iPod
VLC - multi format media player, supports virtually every codec you'll ever come across
MP3Trimmer
Adium iTunes Controller-control itunes from adium
http://www.smartelectronix.com/~destroyfx/audiounits.html
Audacity Free well spec'd audio editor
Radiolover Automated Stream recorder
Our Tunes Browse and download from other people's iTunes Music Shares
Ffmpegx Graphic user interface designed to easily operate more than 20 powerful Unix open-source video and audio processing tools
Jalbum Cross-platform Java based web album creator
Midi Monitor Displays MIDI signals
SysEx Librarian Communicate with MIDI devices using System Exclusive messages
Pd Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical processing
Supercollider Realtime sound synthesis server
Soundflower System extension that allows applications to pass audio to other applications
Utilities
BurnAgain - burn recordable media multiple times
DS_Store Cleaner - cleans DS_Store files from your computer.
MT-NewsWatcher - Usenet news client
Pacifist - lets you see inside package files and verify existing installations.
RAR Expander - a nice rar expanding app made with the WinRAR library
Stuffit Deluxe - work with all manner of archive formats, use
this link to download.
ToastMount - mount disk images with a doubleclick
Deloalizer-frees up disk space by deleting files that contain data on other languages
Carbon Copy cloner - Free Backup/Bootdisk cloner
OSX Cocktail Swis army knife for Mac
Bwana View Command Line Manuals in you browser
Bzip2 Bzip2 compression library and tools. Bzip2 is a freely available high-quality data compressor
NeoOffice/J - a open-source option to using MS Office with word processing, spreadsheet, presentation, and drawing programs.