Freeware... because the software police will eventually carry mace.

SMARTReporter


corecode.at/smartreporter/
Mac OSX
Monitor your OS X (or OS X Server) hard drive/s. SMARTReporter runs in the background and periodically checks the SMART status of your hard drives.  SMART is a technology installed in the firmware of hard drives which detects hardware failures, or impending failures.  SMARTReporter can be set to popup alerts or send an email if there is a problem.

Transmission


www.transmissionbt.com
Mac OSX
My favorite Bittorrent Client. Extremly Lightweight with just the right amount of features.

Integrity and Xenu's Link Sleuth


Xenu's Link Sleuth
Mac OSX, Windows
If you run a website, it is always a good idea to check peridically for broken links. These two programs are the best automated link checkers I have found. Integrity for Macs, and Xenu's for PCs.

Njam


njam.sourceforge.net
Mac OSX, Windows, Linux
Njam is a full-featured cross-platform pac-man-like game

TextWrangler


barebones.com
Mac OSX
A free scaled down version of the popular BBedit program. A big help for projects that require a pure text editor (one that does not apply formatting), such as unix scripting, javascript, plist editing, or HTML coding.  See their site for the long list of features.

Smell-O-Mints


www.jschilling.net
Mac OSX
The periodic table of elements never looked so good. With an aqua and brushed metal interface, this periodic table will display basic characteristics of each element when you click on them.

Mouse Locator


www.2point5fish.com
Mac OSX
Great for presentations or demonstrations on the computer. Mouse Locator will put an target graphic around your mouse cursor whenever a set hotkey is used. You can set the duration, intensity, and hotkey combination.  In addition, Mouse Locator allows you to chose which graphic is used and weather or not mouse clicks should be highlighted.

Firefox


mozilla.com
Mac OSX, Windows, Linux

Probably the most widely recognized open source program, Firefox is a very secure and versatile web browser. Some of my favorite classroom add-ons to Firefox include: adblock menu editor public fox. And if you ever need a hand with something there is a great support community at mozilla.com.

MorphX


www.norrkross.com
Mac OSX
Use Norrkross MorphX for calculating images or movies where one image transforms into another. Simply drag 2 images to the document window, drag a few lines to indicate similar areas and Norrkross MorphX calculates images so that it looks like the first image magically is transformed into the other. You can save the morph as as still image snapshot or as a full animated QuickTime movie.

Disk Inventory X and WinDirStat


windirstat
Mac OSX, Windows
Both programs are similar in function.  DiskInventory X works in OSX, WinDirStat in Windows.  When opened both programs index the files and folders on your hard drive (this could take awhile), then display the sizes of said files and folders graphically.  This helps answer two important questions:
1.  "Who is taking up all the space on my file server" - Network Admin
2.  "How do I get rid of this message saying my startup disk is full" - User

SyncBack


www.2brightsparks.com
Windows
A simple yet powerful backup utility for Windows.  Can be used to backup or synchronize critical folders to backup drives, or network shares.  Contains many advanced options like email notifications, encryption, compression, filtering, and will even close active programs if you like.

Image Tricks


www.belightsoft.com
Mac OSX
This is not so much a image editing program as it is a image manipulation program. With Image Tricks you can apply a large number of effects to pictures using the core image filters built into OS 10.4.

Gawker


gawker.sourceforge.net
Mac OSX
Makes time-lapse photography/movie making extremely easy using the built-in iSight on the new macs, or any attached camera. Just input the interval between frames, and what movie output you would like. Interesting also is it's ability to attach to remote cameras attached to other macs through bonjour.

NHR


mac.softpedia.com
Mac OSX
Network Home Redirector is a series of install packages for OSX which simplify's the task of redirecting the cache stores for things like fonts and Microsoft Office when you are logged into a network home folder. Before now this process was complex to setup, but essential in districts using Network home folders in conjunction with Microsoft office.

PDFCreator


pdfcreator
Windows

Every Mac user knows that you can create a PDF directly from any print job in OSX.  But did you know you can get the same functionality in Windows?  Enter PDF Creator.  A free tool which will act as a virtual printer, and create PDF files from any print job.

QuickSilver


blacktree.com
Mac OSX

Possibly my favorite utility ever created for OSX.  It is hard to describe what the program does exactly.  But I guess it could be called a application launcher.  Basically you press the specified shortcut key, and then start typing the title of what you want to launch be it a program, address book entry, bookmark, etc.  Sounds simple, but it can have a big impact on the way you navigate OSX.

ClamXav


clamxav.com
Mac OSX
Free virus scanning for OSX.  Yes it's true that viruses, for the most part, do not effect OSX users.  However, since most of the world uses Windows it is a good idea to make sure you are not emailing something harmful to your fiends and colleagues.  It also will scan for macro viruses which are a problem if running Microsoft Office on a Mac.

iStache!


freemacware.com/istache
Mac OSX

This programs sole purpose is to help putting staches on your photos. Nice!

JumpCut and Clipboard Buddy


Clipboardbuddy
Mac OSX, Windows
Both programs are what is commonly called clipboard-buffers. This means they will quietly sit in the background on your computer and store things that you cut or copy to the clipboard. After using one for a bit you will find yourself wondering how you ever got by with only copy/pasting one bit of text at a time. JumpCut is for OSX and Clipboard Buddy is for Windows.

Bonjour Browser


www.tildesoft.com
Mac OSX
The application will scan the LAN for any nodes which are Bonjour enabled, and present them in a single window.

Img2icns


www.img2icnsapp.com
Mac OSX
 Img2icns is a converter tool for your images. Enjoy creating thousand of icons from your pictures.

SpiceWorks


www.spiceworks.com
Windows
Is a network monitoring and inventory type software.  It can track and give all kinds of details about nodes on your network (PCs, Switches, Routers, Printers, etc). Unfortunately it must be run from Windows. But it can report on OSX, Linux, and Unix stations just fine.

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