Ever wanted to compare two numbers? With the simple 8 bit comparitor, now you can! This design can easily be changed to fit any bit width one would desire, so don't fret, your 2 bit or 32 bit computers will still know when A is greater than B!
I've deployed this in previous projects (most notably my JCU series), but the comparitor is handy enough that I believe it deserves it's own mention.