Apple Mac OSX Freeware and Open Source List

Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.
Adobe PDF Reader
Adobe® Reader® is free software that allows everyone to easily and reliably view, print, and search PDF files.
A free application that synchronizes files and folders between locations. Typical uses include sharing files, such as photos, with other computers and creating backup copies of files and folders.
Audacity is free, open source software for recording and editing sounds.
Azureus: Java BitTorrent Client
Azureus implements the BitTorrent protocol using java language and comes bundled with many invaluable features for both beginners and advanced users to download torrent files.
Caffeine is a tiny program that puts an icon in the right side of your menu bar. Click it to prevent your Mac from automatically going to sleep, dimming the screen or starting screen savers. Click it again to go back.
Chicken of the VNC
Chicken of the VNC is a VNC client for Mac OS X. A VNC client allows one to display and interact with a remote computer screen.
Disk Inventory X
If you’ve ever wondered where all your disk space has gone, Disk Inventory X will help you to answer this question.
Dropbox allows you to: Access your files from any computer, Collaborate on files with others, Keep track of every version of your files. If you have more than one computer – you need this!
Use Evernote to save your ideas, things you see, and things you like. Then find them all on any computer or device you use. For free.
Filezilla FTP Client
This is an excellent FTP program. It is open source software and is more than competitive with commercial versions.
Gmail Notifier
The Gmail Notifier is an application that alerts you when you have new Gmail messages. It displays an icon in your system tray to let you know if you have unread Gmail messages, and shows you their subjects, senders and snippets, all without your having to open a web browser.
Mozilla Firefox
Firefox empowers you to browse faster, more safely and efficiently than with any other browser. Excellent free alternative to Internet Explorer.
Mozilla Sunbird and Lightning
Excellent calendar from the Mozilla Foundation. The Lightning extension adds a fully integrated calendar to Mozilla Thunderbird. Recommended for all Thunderbird users!
Mozilla Thunderbird E-mail Client
Thunderbird makes emailing safer, faster and easier than ever before with the industry’s best implementations of features such as intelligent spam filters, a built-in spell checker, extension support, RSS reader and much more.
NetBeans IDE
All the tools you need to create professional desktop, enterprise, web, and mobile applications with the Java language, C/C++, and even dynamic languages such as PHP, JavaScript, Groovy, and Ruby.
It allows you to verify the Startup Disk and the structure of its System files, to run misc tasks of system maintenance, to configure some hidden parameters of the Finder, Dock, Dashboard, Exposé, Safari, Login window and of some of Apple’s own applications, to delete caches, to remove a certain number of files and folders that may become cumbersome and more. 3
Application includes the key desktop applications, such as a word processor, spreadsheet, presentation manager, and drawing program, with a user interface and feature set similar to other office suites. Works with a variety of file formats, including those of Microsoft Office.
Songbird is an open-source customizable music player that’s under active development. Lots of features include media library – and my favorite Lyric & Artist info. Think iTunes with an open source community
TextWrangler is the powerful general purpose text editor, and Unix and server administrator’s tool. Great for quick edits to any type of text, xml, code, etc files.
TweetDeck is your personal browser for staying in touch with what’s happening now, connecting you with your contacts across Twitter, Facebook, MySpace, LinkedIn and more.
VideoLAN – VLC media player
VLC media player is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, …) as well as DVDs, VCDs, and various streaming protocols.
Turn your PC into an easy-to-use virtualization platform with Sun xVM VirtualBox, the free and open source software that runs on all major operating systems and eliminates the need for tradeoffs or multiple hardware systems. Great for testing different versions of Windows, Linux or other OSes!
XAMPP is an easy to install Apache distribution containing MySQL, PHP and Perl. XAMPP is really very easy to install and to use – just download, extract and start. Basically install your own web and database server. (P9F6ECU7M84Z)