We've mentioned Dropzone before as a Friday Favorite, but I just happened across the app while I was trying to solve a problem.

I suspect many TUAW readers find themselves in the same situation that I am in: I use a desktop and a laptop. I often find myself wanting to move files between these two machines, so here's what I do: switch to Finder, click on the shared Mac I want, navigate to the folder I'm looking for, and then track down the file I want to copy there and drag it over. I could drag a folder from the other computer to my "Places" sidebar in Finder, but honestly, I just never do.

What I wanted was something quick and painless. I tried to whip something up using Automator and Folder Actions where it would copy/move files saved in one folder to the other machine, but even that would get messy. Most often I don't want to move the file, I just want to copy it. I could put the files in Dropbox, but some of these files are sizable (i.e. the 30+ MB iMovie update). To use Dropbox for this would take a long time.

Turns out that Dropzone offers the perfect solution: by enabling FTP on both Macs (System Preferences > Sharing > File Sharing, then click the "Options" button, and check the box "Share files and folders using FTP") I now have a drag & drop solution to copying files between computers. Simply drag the file to the Dropzone icon on the dock and then drop it onto one of the many "dropzones" which I have defined, and Dropzone does the rest. Two folders that I added almost immediately? The "Automatically Add to iTunes" folder in the iTunes folder and the Auto Import folder from inside my iPhoto Library (you will have to control-click your iPhoto library and choose "Show Package Contents" to find the "Auto Import" folder).

There are several plugins available to extend Dropzone to other services such as ImageShack, TwitPic, Flickr, and more. For Internet services, not only will the file get copied to where you want it to go, but the URL will be placed on the clipboard so you can paste the URL wherever you want it to go. I often FTP files to my website, and files Dropzone FTPs to a website can also support putting the URL on the clipboard.

There are several other nifty options, Dropzones for starting the screensaver, putting your Mac to sleep, or drag & drop printing a file to the default printer. You can also zip files (or zip and email them) and many other conveniences.

The biggest feature of all was one that I almost overlooked until I watched a screencast from macosxscreencasts.com about Dropzone. A built-in Dropzone called "Install Application" will allow you to drag a .dmg onto Dropzone and have the DMG mounted, the app installed to /Applications, the DMG moved to the recycle bin, and the app launched (it also works with applications which have been .zip'd instead of put into a disk image).

If you are anything like me, the "install a new app" process is several steps that you repeat a lot. Dropzone's handling of it is incredibly fast and works really well. If it opens a DMG it cannot handle (such as an installer), it will simply open the folder. Great, start stuff that saves you time and frustration. Remember how computers were supposed to make our lives easier? Dropzone does just that.

Daisy Disk is the perfect example of one of those tools that should be built right into OS X.

It's the latest in disk visualization utilities -- software that scans your hard drive and lets you know which files are being hard drive hogs (in my case, World of Warcraft - no big surprise there). But, it's the added features that turn this from basic to "wow, why didn't Apple develop something like this?"

Once you initiate the software, you'll see a list of mounted drives on your network that you can scan. I scanned my main drive. It took less than four minutes for it to go through the 120GB drive and display everything in a circular graphic that does remind you of a daisy wheel.

Each section of your drive is color-coded for its specific purpose. The closest parts to the center of the graphic are the root levels. Going further out will net you very specific details on file sizes. Clicking on one section move it to the forefront and let you see everything on that level. When you get down to the files themselves, tap the space bar to preview the file. Then, right click to expose those files in the Finder, then do what you wish with them. Then, click on the inner circle to go back out to the level above. For smaller files and folders, it's better to use the list on the side rather than try to pick things out of the wheel.

Doing this enabled me to find large files that I hadn't seen in years, including a folder of old backups from 2006 that got carried over from my iBook. Deleting those netted me 7GB of space. The only feature really not working properly is the preview portion. When I tried playing .M4V video sources, I was rewarded with a grey screen. Regular .AVIs were fine.

DaisyDisk costs $19.95USD and requires OS X 10.5 or higher. You can do a full-featured download for free, which gives you a great taste of what it has to offer. For those wanting the same sort of tools, but for free, give OmniDiskSweeper or GrandPerspective a try.

I want to make a quick mention regarding one of the most useful utilities I've found in recent days: SizeUp. It allows you to resize and reposition windows using keyboard shortcuts. It's no secret that I like my screen real estate, and making the most of it is a big deal to me. You can sit and resize windows all day, but I'd rather hit a couple of keys and have everything in place.

SizeUp offers half-screen (vertical or horizontal) and quarter-screen sizing (easily positionable in any corner), as well as a true Windows-style maximize function. You can also set a custom size for the "Center Window" option, which resizes the window to the specified dimensions and positions it in the center of its current screen. Not the screen you want? The last set of shortcuts lets you jump the window between existing monitors in your setup.

The hotkeys are configurable, but the defaults (surprisingly) didn't conflict with any of my extensive collection of shortcut combinations. SizeUp is shareware, but you can pay what you think it's worth (Fair licensing). A suggested price of $9.99US doesn't seem at all unreasonable to me. If it's useful to you, but not that useful, a minimum donation of $2.99US is requested. The maximize function alone is worth that. Developers Irradiated Software also offer a "lite" version called TwoUp which can do the split screen trick on its own, free. Grab a fully-functioning demo of SizeUp at the Irradiated Software website.

Tiger users of the world, unite!

You've stayed with Mac OS X 10.4 for a reason, probably that you have a favorite piece of software that still suffers under Leopard. Well, that shouldn't keep you from maintaining your Mac so it's running at peak performance.

If you use Maintain's Cocktail Tiger Edition, zip on over to the website now and download version 4.2. The new version features a huge list of additions, including the ability to search and delete corrupted preference files, a searchable database of Mac OS system error codes, a list of commonly used network ports, and support for the Flock web browser.

New features include the ability to always use expanded Save dialogs, always show the tab bar or open new windows in new tabs in Safari, disabling the Genre column or iTunes Store arrow links in iTunes, and more. Maintain has optimized the application for faster and more reliable performance, and killed a few bugs that made it through testing in the last version.

Cocktail Tiger Edition 4.2 is a free upgrade for current owners. If you're not a Cocktail user, you can buy this utility directly from Maintain in Leopard, TIger, or Panther editions (US$14.95).

Cocoatech's Path Finder is the Mac OS Finder replacement that many users love (including us). If you haven't used it, you are missing out on something. A tabbed interface, insane customization options, powerful search (you can completely override Spotlight if you like) and so much more will have you ditching the Finder in no time. Path Finder can be run in conjunction with the Mac OS X Finder or on its own.

Today, it gets even better with the release of version 5.0. There are cool new features like a dual-pane file browser, which lets you display two folders simultaneously in one window and move files between them. Other new features include sidebar, Favorite Places and shared network places.

Many so-called "power users" complain about the Finder's limitations. If that's you, chances are Path Finder has the fix. It requires Mac OS 10.4 Leopard 10.5, and costs $34.95$39.95 for a single license. (Cocoatech let us know that they're working on the server issues that blocked access to the PF5 pages earlier.)