REALbasic is a rapid application development environment that compiles native applications for Windows, Macintosh and Linux.

Interesting? Seems to be an alternative engine to develop an application, huh? The latest version is REALbasic Pro 2007 r4. For those who already familiar with BASIC (Visual Basic, etc) language, i think it wouldn’t be too difficult to learn it.
Its ability to create cross-platform application will become a plus point. Yet, there’r some site that provide resources for REALbasic developer, such as RBGarage, RBMagazine, and REAL forums.