Three years ago I created a blog post of my port of FreeRTOS to the Freescale HCS08 8-bit architecture. That post was a bit messed up since one of the files was not downloadable. Here is a fixed version of that post (using an easier system that lets me attach files directly to posts.)
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The text of the old post:
I made SMAC compatible with FreeRTOS for the HCS08 chipset. There are two projects here:
1. The latest FreeRTOS for HCS08: FreeRTOS-3.2.4.hcs08.v3.zip