Komodo is the IDE for Ruby and Ruby on Rails!

The new Komodo IDE 4.0 is the first unified workspace for end-to-end development of dynamic web applications. A rich feature set for client-side Ajax languages such as CSS, HTML, JavaScript and XML, coupled with advanced support for dynamic languages such as Perl, PHP, Python, Ruby and Tcl, enables developers to quickly and easily create robust web apps. Komodo is the first IDE to provide professional debugging tools for Ruby and Rails application development. The Ruby interactive shell is available separately or from within debugging sessions. Komodo is the IDE for Ruby and Ruby on Rails!
http://www.activestate.com/products/komodo_ide/more_information.plex

PersonalBrain 4 on Mac OS!

TheBrain has released the first private beta of PersonalBrain 4 on Mac OS! Note that as this is the first release on Mac OS and thus it is not fully functional and it is expected that some users may encounter issues. The Mac OS release is part of the PersonalBrain 4 private beta program. As such, it is not available from TheBrain main web site yet. You’ll need to sign up before you can download it. In order to expedite your approval, please be sure to provide your real name and other contact information as part of the sign up process. To learn more, sign-up, and download, please visit:
http://www.thebrain.com/pbbeta