Hi,
Yes, there isn't KL05 SDK. If you use CodeWarrior, there is rarely demos for KL05 PIT/LPTMR. You can find demos for PWM/RTC in File->Import->CodeWarrior->Example Project_>Kinetis Example Projects(Processor Expert).
Another way is using KDS(Kinetis Develop Studio). Then you can refer to KL03 and KL25's sdk and demo. Drivers are same. It just need you to learn how to call them.
Regards,
Jing