Tunes - Tuneflow

Windows only: Screen capture tool Screenpresso takes screenshots of part of your screen, a specific window, or the whole screen with a shortcut key, then lets you edit, add effects, and even share with email or Twitter.

Windows: If you're a fan of the web site monitoring service Pingdom, they've released a handy desktop alert app to put site updates in your system tray. After going public earlier this year, Pingdom offered free single-site monitoring including SMS alerts, email alerts, and an iPhone app. Now you can grab a free account and the Pingdom Desktop Notifier for instant system-tray confirmation that your monitored site is online and functioning.

Windows/Mac/Linux (with Adobe AIR): Note-taking application Scribbly lives in your system tray and lets you quickly write notes or reminders to yourself, and then will email them to you with a single click.

Windows only: Firefox extension MinimizeToTray Revived is a replacement for the popular MinimizeToTray extension (which has since been abandoned and doesn't support Firefox 3 or later). The simple extension puts Firefox in your system tray with a click of your mouse or a keystroke.

Windows only: Open-source system tray utility Aerofoil helps keep your Windows notebook running longer by automatically turning off Aero Glass and other battery-sucking preferences when you disconnect from a wall outlet.

Linux: There are lots of music and media managers for Linux desktops, and the Music Applet controls almost all of them. It places helpful notifications, button controls, track time, and rating data in a convenient corner for your listening pleasure.

Windows: If you're a number pad ninja and dislike switching to your mouse hand to move windows around your desktop, WinLayout is the perfect utility for your system tray. It utilizes your keyboard to move, resize, and shuffle windows around.

Windows only: System monitoring utility BatteryCare shows detailed information about your battery's wear level, capacity, and consumption—and even shows the CPU temperature as an added bonus.

Windows only: If you're looking for an all-in-one image capture tool that offers more than just capturing, look no further than PicPick. With a built-in image editor (similar to but more feature-rich than Microsoft Paint), a color picker, a color palette (which offers outputs in HTML, C++, RGB, and Delphi), a magnifier, a pixel ruler, a protractor, a crosshair option, and a whiteboard, PicPick covers common designing/editing needs without slowing down your system.

Windows only: System tray notification application Google Reader Notifier for Windows tells you when there are unread items in your favorite RSS reader.