Free MSP430 Compiler Resource

TI CCS Studio 4 comes with eZ430 watch is limited edition compiler.  The max size is 16K.  It is difficult to explore different project without breaking the limit.

Other option for the compiler is
http://www.bipom.com/products/us/3180265.html

http://gnutoolchains.com/msp430/
which can use with VisualGDB plug in in Visual Studio.

Most Popular Unrestricted IDEs and Compilers

• IAR Embedded Workbench for TI MSP430
• TI Code Composer Studio (CCS) Microcontroller or Platinum editions
• Rowley CrossWorks for MSP430 (only a 30-day evaluation period)
• GCC toolchain for the MSP430 Microcontrollers (Free C-compiler)
• MSP430 Development System
• A plugin for Visual Studio that supports MSP430 via msp430-gcc (30-day evaluation)