Hi Zachary,
The best software support for the Kinetis E devices is FRDM-KEXX Driver Library Package (REV 1.2.1) for board support and lots of examples.
It only support CodeWarrior, IAR, and Keil IDE's....all for $'s products.
The KDS IDE does support the KE processor with or without Processor Expert (PE). Without PE is a baremetal application framework and you have to develop all of the code. With PE you can add Components to configure the clock, add peripheral support, etc..
UPDATED:
I found a colleague (Derek Snell) that ported the FRDM-KEXX to support KDS!
FRDM-KEXX Driver Library Package
Regards,
David