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You are correct, I had the wrong link there. The non-time-limited version is the evaluation version. It does have limits on code size (64kB), but the MCU only has 16kB of flash so it doesn't matter. And yes, they unfortunately do want to collect all sorts of information from you, but I'm sure you can find a way to tell them what they want to hear.

That looks like the correct link. You'll probably also want the free IDE (Evalutaion) for firmware development. (Thanks Nadar for the correction). The IDE includes a disassembler at C:\Freescale\CW MCU v10.4\MCU\prog\decoder.exe, so you can turn the .s19 files back into assembly. EDIT: fixed link to IDE.

The cooling node uses a Freescale MC9S08MP16 processor. Datasheet: http://cache.freescale.com/files/microcontrollers/doc/data_sheet/MC9S08MP16DS.pdf Reference Manual: http://cache.freescale.com/files/microcontrollers/doc/ref_manual/MC9S08MP16RM.pdf Here is the cooling node with a 6-pin Freescale BDM programming header in the top left corner. I believe the H100 also uses the same MCU, but I can't find any photos from when I took mine apart to confirm.