Okay so I already covered some cool Mac Applications that I use and like but some of you wanted some cheaper alternatives... meaning FREE or Open Source. So here's a compiled list of some really great Mac Free / Open Source software to check out. All 25 of them! If you know of any other great one's feel free to comment here!
Internet Applications
Vienna
The folks who brought us one of the best freeware newsreader for the mac have just launched version 2! Vienna allows you to subscribe to Atom/RSS news feeds and podcasts using a simple interface with everyones featured flavor of the moment: tabbed browsing. There's also blogging integration, three separate reading layouts and a lot more!
Download Vienna here.
FireFox 2
Probably the best all around browser. Some might disagree but I really do like FireFox 2! So many cool features like reopening your windows to where you left off and a slew of plugins to extend it.
Get FireFox 2 now!
Shiira
Shiira is a web browser written in Cocoa. Since this is the same rendering engine used by Safari, HTML content rendered by Shiira will look the same as in Apple's own browser. The goal of the Shiira Project is to create a browser that is better and more useful than Safari. This browser is pretty nifty if you like eyecandy! It features exposé windowing, Page Dock, a shelf and other unique browser features.
Get Shiira here.
Cyberduck
Cyberduck is an open source FTP and SFTP (SSH Secure File Transfer) browser that is constantly being updated and refined by it's author David V. Kocher. It's really come a long way since I first started using it. Universal Binary.
Download Cyberduck here.
iTerm
If you're tired of Apple's Terminal or just want more flexibility such as tabbed windows, and transparent windows look no further. iTerm is a full featured terminal emulation program written for OS X using Cocoa with complete VT100 emulation.
Download iTerm here.
Transmission
Transmission is a free, lightweight BitTorrent client. It features a simple, intuitive interface on top on an efficient, cross-platform back-end.
Get Transmission here.
Open Source
Adium
Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.
Get Adium here.
Free