Hi there, heres my two pence after switching a month ago,
OFFICE:
iWork 09 - seems a cool alternative to the Microsoft Office weve all been used to. The end results of Keynote are quite impressive.
SYSTEM TYPE STUFF:
Coconut Battery & Coconut Identity - Monitors battery life and charge cycles, tells you the age of the mac and when and where it was made.
Macpilot or Onyx - Seems ok for tweaking and the odd cleanup session. bearing in mind theres not much need to clean up stuff on the mac.
Caffeine - Cool little app that sits in the finder menu at the top, click it to keep your mac awake.
Perian and Flip4Mac - Codecs for Quicktime to let you play the majority of video files, i just have these installed instead of having two media players on my system, kinda eliminates the need to install VLC.
Paragon NTFS or NTFS-3g - NTFS write drivers for the mac, comes in handy if you have a portable drive thats formatted to NTFS. (You can also turn the driver off in system preferences if you have the paragon one.)
BURNING:
Disco - A novel way to burn stuff, dmg image files and files folders etc...
Also Burn (the freeware) is very very good.
MISC / GAMES / ETC...
Transmission - best torrent client for the mac.
Chronosync - great if you have a portable hard drive, keeps things in sync.
Deep Shredder Chess seems the best Chess game for the mac if your into chess.
and finally...........Appzapper - uninstalling all the other stuff your trying on your new mac 🙂
Theres a couple more cool ones ill post later as im not at my mac at the minute and cant remember what else there is or what ive tried.
Im now tempted to start a thread of getting a cream of the crop software list up, any suggestions welcome?......