I wanted to make a compact T-Flip Flop for a silent BUD switch, if you do not know what a T-Flip Flop is, look it up at wikipedia. So I could not use pistons (because of there sound).
I tried to make it smaller as the design of the minecraft wiki and was able to do so. My designs are all one block less long so therefore a little smaller:P
The two different designs work to same and so far as I have tested them. They work the best if the input would be a 2 tick pulse, but by changing the delay of the top repeater, it may also work at longer pulses, but I did not get it to work constant (some times it worked for 3 and 4 ticks pulses, but after a restart of minecraft it did not)