TM4C123

Download the TivaWare serie C    
http://www.ti.com/tool/sw-tm4c
http://www.ti.com/tool/sw-ek-tm4c123gxl
you will get an install file that will deploy after executed, a folder with 
Drivers, examples, ... Default location C:\ti\TivaWare_C_Series-2.1.2.111

Drivers Installation
Download Stellaris® ICDI Drivers :
http://www.ti.com/tool/stellaris_icdi_drivers

Driver installation instructions :
Stellaris® In-Circuit Debug Interface (ICDI) and Virtual COM

Or Install TivaWare serie C, and look for  
C:\ti\TivaWare_C_Series-2.1.2.111\windows_driver

Blinking the RGB http://processors.wiki.ti.com/index.php/Tiva_TM4C123G_LaunchPad_Blink_the_RGB

Links
http://www.ti.com/launchpad
http://www.ti.com/tiva
http://www.ti.com/tool/sw-tm4c      C series code base
http://e2e.ti.com/   TI E2E Community
http://www.ti.com/tool/ti-rtos   TI-RTOS
http://focus.ti.com/general/docs/video/Portal.tsp   VIDEOS

Wifi Modules
CC3100
CC3200

Project examples
- http://users.ece.utexas.edu/~valvano/arm/
- Install TivaWare™ for C Series, and search in folder ...
  C:\ti\TivaWare_C_Series-2.1.2.111\Examples\...

FreeRTOS Example
Install TivaWare™ for C Series, and go to...
C:\ti\TivaWare_C_Series-2.1.2.111\examples\boards\ek-tm4c123gxl\freertos_demo

Using the IDE Keil https://bluetechs.wordpress.com/zothers/x/tm4c123/ 

Hardware
Block diagram of the TM4C123x microcontrollers,
makes uses of the processor architecture core Cortex-M4, 32-bit.

  
The board has 40 header pins, organized in 4 connectors : J1, J2, J3 and J4. 
The table below, show how J1 header pins are connected to the microcontroller pins 
and which GPIO functions can be selected.

look at the PDF document TM4C123 User´s Guide to see the other connectors J2, J3 and J4,
 the schematic, ...and more.

.