Hmm I don't have time to link it all, but I'll List names, and give descriptions. If it is still currently available upon reading this post, it should come up in a quick search.
I have owned a iMac for about a year now, running OS X 10.4.11 (Tiger)
During my time, I have found a variety of programs and other things useful:
SingThatiTunes -- Widget that can search for lyrics, and auto-save them to iTunes. This has worked much better than any previous one I tried, but alas, won't work on all songs.
Show IP Dashboard widget -- self explanitory... my network utilities shows my network address
Plasma Tube - little lava lamps on your dashboard ..makes it look cool anyway
Firefox - It's the little things I like during browsing, I still use safari for it's "Activity Window" though
Safari's Activity Window - Command+Option+A - Displays everything loading on a particular page. You can download almost any flash movie or music file with it. Look for an item loading in the list with "MB" in it, as most web items are only "KB" in size. Double-click the line, and safari will download the file (great for youtube videos)
Xee - Best "Preview" replacement ever. It can scroll through all images in a folder with the mouse wheel, and also *plays* animated .GIF images. If you're like me and switched from windows to Mac, that would have bugged you for some time.
Perian Quicktime plugins (also works in iDVD) allows quicktime to play a large variety of files. If working correctly, it can play AVIs, just don't try to seek or edit them (that's when quicktime crashes) use VLC to play
$$quicktime Pro$$ edit movies and save them right in quicktime. (not AVI's)
iSquint - Convert video files (even AVIs) into ipod format (then quicktime can edit them easily)
$$Keyboard Maestro$$ -- Shareware, great mac Macro program. control iTunes from keyboard, or do any other macro you like. It can even be used to assign hoykeys to open apple scripts.
$$$EyeTV$$$ - watch & record TV on your mac via USB 2.0
Adium Great multi-functional messaging client. Connect to MSN, Yahoo, ICQ, AOL, Myspace, iChat & more
Transmission - great bittortent client
NetNewsWire - best RSS feed reader I can possibly ask for. Wish windows had one
Audacity - free audio editing program. Reverse audio, split audio, make ringtones.
Capture Me - take screen shots of a movie running in DVD Player.app (OS X screen capture is disabled during movie playback)
coppernicus - free screen recording program.
FunnyPhotographer - free program with some effect that Tiger's Photobooth doesn't have
open office Office utilities that are compatible with Microsoft Office
Paint brush simple paint program, similar to MS Paint
Renamer4Mac Quick, easy file re-namer. Drag files in, select re-name options, click a button, done. I use it to add suffexes (ie MISF_) to all my images (of certain catagories) so that upon import into iPhoto, smart albums will automatically pick it up. Great way to organize.
UnRarX - unpack .RAR files.
Command+Option+Control+8 - inverted screen
Command+Option+I with multiple files selected, this shortcut will open one "get info" window, displaying combined file information. (ie: size of all selected files)
http://alexp3.googlepages.com/content.html - google's helicopter game
if you view the source, you can download the .swf file and play offline!
That is it for now. I will continue to personalize my mac as time goes on.
