I recently asked for some screencasting advice and wanted to put this list up for future reference. I ended up using Jing Free for my particular assignment, but typically use screentoaster.com since it’s free, cross platform, and web based.
ScreenFlow
Price : $99.00
URL : http://www.telestream.net/screen-flow/
Notes : ScreenFlow looks freaking amazing. If I had to do regular screencasting, I would spend the $99 to get this application. It appears to do, save, and export everything. This is the best solution for any professional screencaster.
Snapz Pro X
Price : $69.00
URL : http://www.ambrosiasw.com/utilities/snapzprox/
Notes : If I was going to pay money for a screencast app, it would be ScreenFlow. However, I do use Ambrosia Soft’s Wiretap Studio, so I know they make great software. If $30 is enough to affect your decision, I would highly recommend looking at this before ScreenFlow.
Jing Free
Price : free
URL : http://www.jingproject.com/features/
Notes : Jing Free is pretty sweet, but only captures a maximum of five minutes of video. For my assignment that ended up being good so I could keep my videos short. The pay service looks really helpful for sharing captures ( images, videos, etc ), but I just can’t justify signing up for this yet.
Silverback App
Price : $69.95
URL : http://silverbackapp.com/
Notes : This capturing app is geared towards taking videos for usability studies. This is a really cool application that I’d take a closer look if I wasn’t such a server side programmer. Be sure to watch the demo, it’s a really cool application, just not good for what I was doing.
Screentoaster.com
Price : FREE
URL : http://www.screentoaster.com
Notes : This is a free web based screen recording service that I use fairly often. You can’t beat free, and this will run on your MAC or PC since it’s browser based. Definitely worth a look if you need something quick and want to sharing capabilities.

Thanks for the list. Did you consider Camtasia for Mac? It is from TechSmith, the same company that makes Jing. Full disclosure, I work for TechSmith. How did Jing work for you?
Not to pick nits, but in this statement: "enough to effect your decision" the word "effect" should be "affect". "Effect" is a noun, "affect" is a verb (except in psychology).
Otherwise, thanks for the info about OSX screencast tools!
Thanks Jason! I always say the better at computers I get, the worse I get a english.