Also agree with Bart on Evernote and NetNewsWire. Over the last 7 years I have used lots of RSS readers and NetNewsWire is hands down the best one. Great interface, lots of options, and the synching and the iPod Touch app make it perfect. Yeah GoogleReader and other web based RSS readers give you the same synching, but I got a Mac because I love beautiful and well crafted software.

Agree with Alison on Skitch and AppDelete. Skitch is just plain awesome freeware and fun to boot.

I also like DropBox, Caffine, SoundSource, Transmit, FireFox, MagiCal, Skype, But use TweetDeck instead of Twirl since it has great grouping capabilities. Use TextExpander over RapidoWrite since I had problems with RapidoWrite always working everywhere I wanted it to work. The latest TextExpander just works.

The latest version of Pathfinder gives me Finder on steroids and the power I was use to with file managers in Windows. I love Pathfinder.

AppFresh is great to keep all program up to date.

As a lover of books Bookpedia was an answer to my book cataloging dreams. I prefer it over Delicious Library because it focuses on a single task and does it extremely well with lots of options to import/export and it has an iTunes App store app. The wish list part of it is excellent.

iClipboard. I had been looking or a clipaboard app and this one went on sale and so I got it. Very simple, but retains formatted words and images. Just what I wanted. I use to use the freeware app JumpCut and it is great for just retaining text.

MainMenu. I have three monitors on my 2008 Mac Pro and MainMenu lets me access menu bar shortcuts without moving my mouse all the way over to the menu bar.

Surprised you didn’t have 1Password on the list. I bought it earlier this year when it was on sale and love how it works with every browser I use. Plus the iPhone/IPod Touch version is quite useful Plus now you can select an Agile keychain and you can have it sync to dropbox so you never have to worry about losing your passwords.

As a switcher I still use VMWare Fusion, but pretty much only for work stuff since I am a Visual Studio programmer. If I didn’t have to use Visual Studio I could easily go all Mac. Everything I use to use on Windows I found a better replacement for in OSX.

Pluto is a cool menu bar app that just stores text. I use it for text that I use only once in awhile and don’t want to assign a keyboard shortcut to in TextExpander.

FStream. Great freeware app to listen to and record internet streams. Simple but it works.

Open Office 3. Now that it is written in Cocoa and supports Aqua it is quite excellent and I never use Microsoft Word anymore even though I have an MSDN account.

Aptana Studio – excellent freeware programmers editor which is great for xml, css, and multiple languages. Use to use Komodo Edit which is also quite good.