And a toolchain. Usually you work in C, TI has a tool based on eclipse and gcc, TI Code Composer Studio:
http://www.ti.com/tool/ccstudio
BTW TI Stellaris MCU comes with some really good libraries that are included in ROM.
Usually what happens with this boards is that they're used for a lot of different projects by hackers. Expect to see a lot of activity in space like you can see on hackaday:
http://hackaday.com/tag/launchpad/