quicksilver (use it practically all day)
terminal (luckily comes with your mac.. lol)
Textmate (programming, debugging, plus their bundles cover just about every language under the sun)
Coda/Transmit (i list them both because this is what i'll use if it's just a quick html/css edit through ftp, transmit being the ftp program that kicks more ass than the ending to freebird)
Adiumx (chat - all networks, including home-grown xmpp/jabber setups....was the first to enable facebook chat by figuring out what commands they implemented on their custom jabber server..)
colloquy (irc client w/ light footprint, no bells and whistles, and to change the look of the client just change up the css..ohhhh yeah)
SnapnDrag - I think it's since been renamed by the author but still is shareware/freeware.. regardless it's one of the best screenshot/snapshot apps i've come across + use often
Dropbox.com (yes i know it's not technically an app but it's osx integration makes uploading files to you own free storage space a snap... esp making files public so you can quickly send stuff to your friends)
Parallels/VMware - Ok, parallels is considerably faster for running xp, however i use vmware for any dev linux environment because from setup->running take no time at all).
XLD - all sound file conversions.. i.e. flac->mp3, etc.. fast, multi-threaded, awesome
Versions - SHN repository GUI
SmartGit - Github GUI repsotitory
MarsEdit - Easy way to edit blog posts, multiple ways (obv. xml-rpc being the easiest/go-to way).
Mamp Pro - Way better (in my opinion) than using the locally installed apache server.. easy as hell to make quick changes to the environment on the fly... great for a quick local dev environment.
Lil Snitch - Lets me know as well as block any application from phoning home
1Password - too many passwords/logins, this keeps track of them all and is accessible via any browser.
DeepVacuum - when you really just want to rip a site for your own archives
Then there's a few CS5 apps.. but who cares about adobe, right?
