The MSP430 Bootstrap Loader (BSL) is a small and easy-to-use program built into each MSP430 device and enables device firmware updates via UART or USB. For 5/6xx devices, the code for this is open source, and customizable in the device to enable other functionality or communication interfaces.
In order to make communication with the BSL easier, TI is releasing the MSPBSL_Library as an Open Source Project on Github. This library encapsulates all the complexity of communication with existing 5/6xx BSLs behind an easy to use API so developers can focus on the creation of their test or programming systems. The Library is Object Oriented, and Cross Platform.
The library will be expanded to support the 1xx/2xx & 4xx MSP430 devices in the future as well, so stay tuned!