Hi Kyle,
You can find a USB device HID Keyboard example for the FRDM-KL26Z in Kinetis SDK 1.3, you can download the Kinetis SDK 1.3 Mainline release from this page:
Software Development Kit for Kinetis MCUs|NXP
Here is a video about the installation of KDS and Kinetis SDK:
Kinetis Design Studio Videos, Part 1: Installation of KDS and Kinetis SDK
The example can be found on this path:
C:\Freescale\KSDK_1.3.0\examples\frdmkl26z\demo_apps\usb\device\hid\hid_keyboard\bm\kds
Hope it helps!
Best Regards,
Carlos Mendoza
Technical Support Engineer