Scan & Fix 50 registry issues FREEUtilities
There are hundreds of unique tools to download for everything from Mac maintenance to sharing files between computers. Here are a couple of our favorites that every user should consider.
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Dropbox
Dropbox is a free and extremely easy-to-use tool for sharing files and syncing them between computers, and you can also use Dropbox to back up files and access them from other computers and devices (including from your iPad or iPhone, with dedicated apps for each of those devices).
Dropbox's interface is largely invisible, which is part of what makes this app so easy to use. When you install Dropbox on your Mac, you create a Dropbox folder. This is a local folder that lives on your Mac, but you can access the folder from other computers (Macs or PCs), or anywhere you have access to a Web browser. Even better, you can use this folder to share files with other people -- either through a designated "Public" folder, or by setting up folders inside your Dropbox with shared access by multiple users that you choose (this solution can be particularly useful in work settings as a productivity tool, especially because Dropbox tracks older versions of files). You can also use Dropbox to back up your files online, although the biggest barriers to this are the size of your backups (you get 2GB free with Dropbox, or up to 100GB with a monthly fee) and the fact that backup files need to be located inside your Dropbox folder (there are some workarounds, though, for more technically savvy users).
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PCalc
PCalc is a high-powered scientific calculator that goes beyond the features found in the built-in Mac OS scientific calculator. Scientists, mathematicians, or just serious students will find quite a few bonus features comparable with those found in standalone programmable scientific calculators, which PCalc's interface mimics -- including quick one-key conversions, constants organized by field (from astronomical to physicochemical), an optional RPN mode that matches modern calculators, and decimal, hexadecimal, octal, and binary modes. You can also write your own functions and conversions, maintain multiple calculators (all with different states), and use PCalc's slightly lower-powered Dashboard widget for quick calculations. PCalc even comes with a virtual tape, so you can look through all your past calculations, and you can resize and skin your calculator with a variety of themes. Read full review
