Here’s what I use most often. I’d made a couple of additions, at the bottom. They are worth looking at, too.
Apimac timer * No kidding, I use it when I do laundry.
Audacity * I’m more comfortable with it than garage band.
Caffeine * It keeps your laptop from going to sleep or powering down. Perfect when you’re working at a desk or are powered up.
Cyberduck * FTP program
Firefox * Web browser.
Flickr Uploadr * It, uh…. yeah.
Gimp * Open Source Photoshop.
Google Earth * Mmmmm, satellite imagery and geospatial goodies.
Google Updater * Keeps all the Google software up to date.
Handbrake * Converts DVD’s to Xvid or Quicktime, in one step.
iChat * uses AIM and Jabber / Google Talk protocals.
iScrobbler * Works with last.fm and iTunes
iSquint * Video converter. Makes anything into Quicktime format in AppleTV or iPhone / iTouch size.
iTunes Alarm * An Alarm that plays iTunes. Versatile.
Open Office * Open source office suite
Parallels * Windows emulator. NOT FREE.
Picasa Web Albums Uploader * Bulk upload to Picasa.
Skype * Video teleconference, and phone calls out (if you pay).
Symantec AV, because the Army gives it to us free.
Time Machine. OS X back up program. I got a 250GB from the PX, 2.5″ that is powered via USB.
Toast 9. Not free. DVD / CD authoring.
Twhirl (runs on Adobe Air) * For twitter.
UnRarX * Handles all kinds of compression formats.
VLC (MUST!!!) * open course media player.
Vuze * For torrents
What’s Keeping Me * Helps ID when something is wrong.
Wireshark * But I’m trying some alternatives right now.
Updated:
TubeTV. Download flash videos (YouTube, Google Video) as Quicktime, formatted for iTunes. (Thanks, Chris)
Quicksilver. String together commands into a user-defined keyboard stroke. (Thanks, Chris)
Adium — for all your instant messaging needs. AIM, MSN, Jabber / Google Talk, Yahoo, and more. (And again, thanks, Chris)
Great list here, with links. VirtualBox is probably the best of the bunch — but then again, I paid for Parallels. And I looooove GIMP.
Also, if you’re getting into Mac, you might want to get smart on iTunes magic. I wrote about it a couple of times, and it’s all clumped here.


