The pre-installed applets aren't the only game in town. Here are a few useful panel applets you can either download from the Web. or install using a package manager like Synaptic.
If you blog, there's no need to log into your weblog to write an entry. Blog Entry Poster allows you to quickly write and publish blog posts. It's a very basic editor -- you can add simple font formatting, links, and images but little else. And you can only configure it to work with one blog. Still, if your needs are simple then this applet is definitely handy.

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Keeping track of all the thing you need to do can be tough. So, by not add a todo list to the GNOME panel? It's easy with
Gnome Todo List Manager, aka gtodo. Just create your todo list and add items to it. When you're done, check them off. This applet is definitely bare bones, but it does the job. To use it, you'll have to install both gtodo and its panel applet component.

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I maintain two Web sites, and prefer to securely log into the servers using the ssh utility when I need to modify or delete files. Instead of doing the job from the command line, I can use a panel applet called
SSHMenu. With it, I can simultaneously connect to multiple servers and even group servers together in their own menus. SSHMenu also allows me control the font, the background color, window size, and other settings for each connection.