Letterbox is a plugin for Apple's Mail.app that takes advantage of your widescreen monitor.

Letterbox is a mod that turns Mail’s window into a widescreen one - perfect for displays like my MacBook Pro’s

It rearranges the interface into three vertical columns – so the message pane is to the right of the message list, rather than below. You'll probably need at least 1280 and perhaps 1440 horizontal pixels for this layout to work well for you.

The Unarchiver is a much more capable replacement for "BOMArchiveHelper.app", the built-in archive unpacker program in Mac OS X.

The Unarchiver is designed to handle many more formats than BOMArchiveHelper, and to better fit in with the design of the Finder. It can also handle filenames in foreign character sets, created with non-English versions of other operating systems. I personally find it useful for opening Japanese archives, but it should handle many other languages just as well.

It is very simple to use and install - simply copy it into your Applications folder or whereever you prefer, and then set archive filetypes to open using it. This can either be done the usual way, or by double-clicking the icon to show The Unarchiver's preferences.

Supported file formats include Zip, Tar-GZip, Tar-BZip2, Rar, 7-zip, LhA, StuffIt and many other more or less obscure formats. Support for so many formats is achieved by using the libxad unarchiving library.

The Unarchiver requires Mac OS X 10.3.9. There is a Google Code page for The Unarchiver, where you can report and track bugs.

Blender

Blender is the free open source 3D content creation suite, available for all major operating systems under the GNU General Public License.

Note: These guys really know how to sell their product, eh? (Not!)

You've got to check out the site, awsome images!

The Gimp

Impressive fully featured open source photo editor.

As good as the awesome 'Photoshop' but FREE - the best description is given by Wikipedia rather than the GIMP download site

Read about it here

Not for the faint hearted though, requires some learning (as does Photoshop) but if you're serious about photo editing - don't miss this!

NeoOffice is a full-featured set of office applications (including word processing, spreadsheet, presentation, and drawing programs) for Mac OS X. Based on the OpenOffice.org office suite.

NeoOffice has integrated dozens of native Mac features and can import, edit, and exchange files with other popular office programs such as Microsoft Office.

Released as free, open source software under the GNU General Public License (GPL), NeoOffice is fully functional and stable enough for everyday use. The software is actively developed, so improvements and small updates are made available on a regular basis.

Punakea is a little app trying to help you cope with the day-to-day struggle of managing your files.

Designed to complement Spotlight, it allows you to tag your files and bookmarks, freeing you of the strict hierarchy of the Finder's folder structure.

What are tags? A "tag" is like a keyword. Tags can help you to group files which have something in common.

Why should I use tags? Well, first of all, you can add as many tags as you like to a file, instead of having to go for a single folder. This has a nice side-effect: By assigning multiple tags to a file, you relate them to one another, which greatly improves your browsing experience - all the related tags are shown, as soon as you select a single one.
Then there is another thing, which will be especially interesting for the GTD crowd: tags can not only be used to describe a files meaning, but also to give the files a status - like todo, priority and the likes. To make it short: Tags give you more freedom in organizing your data!

Scrivener Gold is a freeware release of an early beta version of Scrivener.

Writers of all kinds should find Scrivener Gold useful for maintaining and organising writing and research.

Scrivener Gold has evolved a lot since this beta - the interface is much prettier and more intuitive, and the feature-set, whilst generally the same, has been refined and much improved. Scrivener Gold is missing the niceties you would expect from a finished application (such as state-saving) and may well have a few minor bugs lurking around, but it is nonetheless a fully-functional piece of software that writers of all kinds should find useful for maintaining and organising writing and research.

Note: Unsupported software; untested on Leopard - Requires Mac OS X Tiger (10.4) - Universal for both Intel and PPC

Sidenote tries to catch the “Stickies” spirit but in the form of a multi-document drawer that will hide in the corner of your screen (left or right)

You can use it to take all your daily notes, include images and easily modify text color and font. Sidenote will automatically expand so that you will be able to drag into it any picture, text clipping or pdf file from the finder or your favorite application. Sporting notes auto-saving, you’ll never have to save your notes. Sidenote will handle that for you. You can also print them or export them to rtf.

iPodBackup is a shell script-turned-application (via Platypus) that backs up your home folder to your iPod on Mac OS X using the open source backup utility rsync. Combine it with Do Something When to have fully automated incremental backups to your iPod, for free!

You can customize a list of items to be excluded by simply dragging-and-dropping them onto the app. By default, the Music folder, as well as certain cache folders are skipped, in order to prevent duplicating your music and because caches are a kind of stupid thing to backup.

A note for first-time users: The first backup can take quite a while, especially if you use an encrypted disk image! Subsequent backups will be much faster, as only files that have changed will be copied over.

ClearDock removes the semi-transparent white background from the Dock so the Dock icons are "floating" on top of your desktop picture. Additionally

It can change the colors of application triangles and of the Dock background to customize your desktop!

Features:

* Removes white Dock background under all Dock icons.
* Changes white Dock background color.
* Changes the applications triangles color.
* Completely free!

Scribus - Open Source desktop publishing

Scribus is an open-source program that brings award-winning professional page layout to Linux/Unix, MacOS X, OS/2 and Windows desktops with a combination of "press-ready" output and new approaches to page layout.

Underneath the modern and user friendly interface, Scribus supports professional publishing features, such as CMYK color, separations, ICC color management and versatile PDF creation.

Inkscape is an Open Source vector graphics editor with capabilities similar to Illustrator, Freehand, CorelDraw, or Xara X.

Supported SVG features include shapes, paths, text, markers, clones, alpha blending, transforms, gradients, patterns, and grouping. Inkscape also supports Creative Commons meta-data, node editing, layers, complex path operations, bitmap tracing, text-on-path, flowed text, direct XML editing, and more. It imports formats such as JPEG, PNG, TIFF, and others and exports PNG as well as multiple vector-based formats.

Inkscape's main goal is to create a powerful and convenient drawing tool fully compliant with XML, SVG, and CSS standards. We also aim to maintain a thriving user and developer community by using open, community-oriented development

Nvu (pronounced N-view)
Finally! A complete Web Authoring System for Linux desktop users as well as Microsoft Windows and Macintosh users to rival programs like FrontPage and Dreamweaver. Nvu (which stands for "new view") makes managing a web site a snap. Now anyone can create web pages and manage a website with no technical expertise or knowledge of HTML.

Ardour is a digital audio workstation

You can use it to record, edit and mix multi-track audio. You can produce your own CDs, mix video soundtracks, or just experiment with new ideas about music and sound.

Ardour capabilities include: multichannel recording, non-destructive editing with unlimited undo/redo, full automation support, a powerful mixer, unlimited tracks/busses/plugins, timecode synchronization, and hardware control from surfaces like the Mackie Control Universal. If you've been looking for a tool similar to ProTools, Nuendo, Pyramix, or Sequoia, you might have found it.

Above all, Ardour strives to meet the needs of professional users. This means implementing all the "hard stuff" that other DAWs ( even some leading commercial apps ) handle incorrectly or not at all. Ardour has a completely flexible "anything to anywhere" routing system, and will allow as many physical I/O ports as your system allows. Ardour supports a wide range of audio-for-video features such as video-synced playback and pullup/pulldown sample rates. You will also find powerful features such as "persistent undo", multi-language support, and destructive track punching modes that aren't available on other platforms.

Mactracker provides detailed information on every Apple Macintosh computer ever made

including items such as processor speed, memory, optical drives, graphic cards, supported Mac OS versions, and expansion options. Also included is information on Apple mice, keyboards, displays, printers, scanners, digital cameras, iPod, Apple TV, iPhone, AirPort Base Stations, Newton, and Mac OS versions.

Todos - everything at your fingertips!

Sometimes you just don't want to take time going to your Applications folder or searching around your hard drive.

Just click a quick hotkey (Command-Option-Control-T) and Todos will simply appear. Todos' job is simple. Todos doesn't do more than it says. Like its definition in Spanish, Todos will show you everything. Todos shows you all your applications in a complete dock. All of us have a plethora of programs, and the Apple dock just can't fit them all. Don't worry. Bring Todos up when you need to get to any of your apps. Click any application in Todos and it will instantly launch. Todos will fade away after application launch. Perhaps you don't want it go go away so fast? Just hold the command key and click. Todos will open the application and remain displayed. Don't forget to stand back and wow at all those cool icons for all of your applications. OS X has beautiful icons, why not see them more?

ibackup - Hard drive failtures, accidental deletions and other mishaps can all be remedied with recent backups from a great program such as iBackup.

iBackup can backup and restore system and application preferences alongside the standard support for securing files and folders. iBackup also gives you the option of a selective backup, or sync, that only backs up altered files.

All of this within the familiar domain of a Finder interface. We also suggest you take a look at Carbon Copy Cloner

another excellent program for those seeking a simple one-stop backup solution.

TextWrangler - THE Text Editor for anyone who types!

TextWrangler 2 is the powerful general purpose text editor, and Unix and server administrator's tool.
What is a text editor? At its most basic, a text editor is a tool for simply editing text. You can use a text editor for a wide variety of tasks from cleaning up data, to editing configuration files on your Mac or server, to writing HTML or coding.

recently awarded the MacWorld 2005 Editors’ Choice Award, TextWrangler allows for easy editing of any file. Easily recognized as the most comprehensive free text editor, TextWrangler features extensive FTP and SFTP support and can even perform Find Differences on a pair of files. TextWrangler is the text editor for a beginner all the way up to a coding guru, until you decide to make the step up to BBEdit. BBEdit adds professional web authoring and subversion server support to TextWrangler’s already impressive feature set. Smultron is another free text editor featured on these pages, and well worth considering.

When extracting audio from compact discs, Max offers the maximum in flexibility to ensure the true sound of your CD is faithfully extracted. For pristine discs, Max offers a high-speed ripper with no error correction. For damaged discs, Max can either use its built-in comparison ripper (for drives that cache audio) or the error-correcting power of cdparanoia.

Once the audio is extracted, Max can generate audio in over 20 compressed and uncompressed formats including MP3, Ogg Vorbis, FLAC, AAC, Apple Lossless, Monkey's Audio, WavPack, Speex, AIFF, and WAVE.

If you would like to convert your audio from one format to another, Max can read and write audio files in over 20 compressed and uncompressed formats at almost all sample rates and and in most sample sizes. For many popular formats the artist and album metadata is transferred seamlessly between the old and new files.

Sample TourImage Tricks is a free application to edit and generate images.
It uses Mac OS X Tiger Core Image filters that transform pictures to unimaginable extent and apply advanced visual effects. The program can create unique artwork you may use as business card background, for web design, print materials and more.

Tricks you can play with an image:

* Adjust colors — Saturation, Brightness, Contrast, Hue, etc.
* Blur your picture in different ways.
* Distort images using Twirl, Bump, Pinch and more.
* Stylize your art: Make Mosaic, Crystalize, use Halftone effects, etc.
* Tile, Kaleidoscope and Crop images.

All of the following properties can be tweened between multiple states:

* Colors, including opacity
* Gradients, including colors and control points
* Text styles
* Image scaling and panning
* Shapes
* Stroke colors and widths