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I just received my PB G4 freshly loaded with OS/X 10.4
I would like to start creating applications.
I am very familiar with the .net suite from MS, but i am not sure
what languages are available for the OS/X.
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It is not "OS/X," it is "MacOS X" or "OS X." As for your question, it is different answers depending on what you are looking for. As
artov said, every Mac ships with
Xcode, which is an integrated development environment (IDE) built on top of standard
gcc (
GNU Compiler Collection).
gcc includes front ends for C, C++, Objective-C, Fortran, Java and Ada. Of these, Apple uses C++, Objective-C, and Java. Python and Ruby are also used.
Third-party programming languages are also available. Absoft Corporation produces C++ compilers and Fortran compilers which are source-compatible with DEC VAX and IBM Fortran. REAL Software produces REALbasic, a popular BASIC language IDE among shareware developers. REALbasic is explicitly supported by Microsoft as an environment to port Visual BASIC applications to the Mac.
My advice:
Xcode is free and already on your computer--or in the box it shipped in. It is the IDE used to develop MacOS X itself as well as most of its commercial applications. Rather than trying to recreate Windows in the Mac environment, jump into MacOS X with both feet. Go with
Xcode and leave Microsoft behind.