InfraRedstone

Transistor

Only lets signal from the back through if the left or right is receiving a signal.

AND Gate

Only lets signal through if all its active inputs are receiving signals.

Shifter

Shifts the binary value of the signal up or down, and ejects any excess bits to the side.

Diode

Transfers infra-redstone signals to vanilla redstone and masks off parts of the signal value.

XOR Gate

Only lets signal through if exactly one input is receiving signal.

NOT Gate and Quartz Oscillator

Left device only outputs signal if it's not receiving a signal. Right device lets signal through after a specific delay.

Glow

All devices have special rendering to glow when active.