things which make it easier to manage your daily desktop work

• BluePhoneMenu - control your Bluetooth enabled phone from your mac
• Butler - a Launcher with hotkey support
• Desktop Manager - a tool for Mac OS X to have multiple virtual Desktops
• Growl - a global notification System for OS X
• MenuMeters - watch the cpu/hdd/network/memory load
• Mplayer - one of the best known media players also availible for OS X
• Quicksilver - a very nice Launcher Application (nice FX)
• SideTrack - a touchpad driver which allows some extra features
• Temperature Monitor - watch the temperature of your CPU
• VideoLAN Client - a nice media player, plays nearly everything
• Virtue - another desktop manager for Mac OS X, its based on Desktop Manager, but its more "sleek" and nicer to use.
• coconutBattery - nice tool to monitor the battery and the lifetime of your mac.