Best feature on the Teensy IMO is usb native, so you can do stuff like emulate a USB keyboard or mouse. Many DIY keyboard projects use them as the brains. https

Best feature on the Teensy IMO is usb native, so you can do stuff like emulate a USB keyboard or mouse. Many DIY keyboard projects use them as the brains. https://www.pjrc.com/teensy/projects.html https://www.pjrc.com/teensy/projects.html has more ideas. Also works great for larger Ambilight displays than Arduino can handle.