These demos run on the LPCXpresso hardware (available from the FreeRTOS shop, I should add http://www.freertos.org/shop :o) using the LPCXpresso IDE. There is an application note to describe their use. The same application note can be used for both the LPC1768 and LPC1343 versions - just replace 1768 in your mind with 1343 while reading it.
FreeRTOS-simple-demo-for-LPCXpresso-LPC1343.zip
FreeRTOS-simple-demo-for-LPCXpresso-LPC1768.zip
FR-191-AN-RB-003-[A simple FreeRTOS demo for the LPCXpresso].pdf