Interface enhancements & addon's

Shapeshifter (Shareware)

ShapeShifter is a revolutionary new product that lets you change the overall appearance of your Mac using 'themes'.

Konfabulator (Freeware)

Konfabulator is another "widget" application, similar to dashboard which allows you to have widgets on your desktop.

Stattoo (Shareware)

Your digital life has a lot of statistics: incoming mail, appointments, disk space. Stattoo "tattoos" stats right on your desktop picture: out of the way, but always handy!

CandyBar (Shareware)

Trick out your Trashcan. Decorate your Drives. Mix up Mail. CandyBar 2 lets you change the Mac OS X icons you usually can't!

Pixadex (Shareware)

Pixadex is to icons, what Apple's iPhoto is to images. Brought to you by Panic and The Iconfactory, the team who created CandyBar, Pixadex lets you import, organize and search huge numbers of icons quickly & easily.

Deskshade (Shareware)

DeskShade 2 sports a fast and easy to use desktop manager where you can keep all your favorite pictures, iPhoto albums, drop images and more. DeskLock allows you to quickly and efficiently lock your workstation.

Menubar addon's

MenuMeters (Freeware)

MenuMeters is a set of CPU, memory, disk, and network monitoring tools for MacOS X which sit in the menubar.

Synergy (Shareware)

Synergy puts three buttons to control iTunes in your menubar: previous track, next track, and play/pause; as well as providing you with visual feedback about the currently playing tune.

Meteorologist (Shareware)

Meteorologist: Weather Access from your main menu or dock

MenuCalendarClock (Shareware)

MenuCalendarClock is an iCal compatible menu calendar and a configurable menu clock. Besides an elegant and streamlined look, it offers many compelling features to make it the ultimate calendaring utility for the Mac.

Chat/Instant Messaging

Adium X (Freeware)

Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.

Multimedia

VLC (VideoLAN Client) (Freeware)

VLC (initially VideoLAN Client) is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, ...) as well as DVDs, VCDs, and various streaming protocols.

Peer 2 Peer

Transmission (Freeware)

Transmission is a free, lightweight BitTorrent client. It features a simple, intuitive interface on top on an efficient, cross-platform back-end.

Acquisition (Shareware)

Highly integrated and featured Mac P2P client which is similar to Kazaa.