Sun Studio 11:Sun Studio 11 software is the latest release of record-setting, optimizing compilers and tools for the C, C++ and Fortran developer. This release delivers the highest optimizations and the best performance in the development of scalable 32-bit and 64-bit applications on Sun’s newest hardware platforms including the latest multi-core UltraSPARC, x64 and x86 platforms. And Sun Studio 11 software now removes the price barrier and is available for FREE!
Isn’t that good news ?!
Liviu Nastasa 
The download size is pretty big ( 592MB for Solaris Sparc Version, more than 300MB for Solaris x32/x64 version)