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- Developer: Ujwal S. Sathyam
[Product Page]
- Price: Free [open source]
If you wish, you can see a larger version(172K) of the image. Using tabs, you can quickly jump from one task to the next (and there's a keyboard shortcut to making cycling both directions quick and easy). The tabs themselves also provide information on the status of each terminal window -- the two red tabs in the screenshot indicate that the particular window has new information for me to see or act on; the active tab is highlighted in blue.
As noted in the comments to the original article, you can use screen to effectively do the same thing. However, as a visual person, I like to be able to see the numerous windows at a glance, and not have to cycle or run a command to see what's happening. One additional feature of iTerm that you can't replicate in screen is that each tabbed terminal can have unique colors for text, background, and selection, as well as unique transparency settings (note a portion of the desktop image showing in the screenshot). You can also add opened windows to an "Address Book," making it very easy to re-activate the program and settings you have in place. It's also a Cocoa application, complete with a customizable multiple-size toolbar (I've reduced mine to text-only in the screenshot).
iTerm isn't perfect; it may have troubles with programs that don't use the standard character set, and it's quit on me a few times in the 45 days I've been using it. However, for me, it's a nearly full-time replacement for the Terminal. It's also got a great set of features if you find yourself using multiple terminal windows relatively often (and you're not a full-time UNIX user with tons of experience using screen). Give it a look if you're interested in tabbed terminal windows; at worst, you'll be out a few minutes of your time.

