For the past few years we have been developing structurally simple, easy to make, modular, and tunable hydrazone-based functional materials (e.g., switches, sensors and fluorophores).1,2 This presentation will deal with our recent advances with these systems, with an emphasis on signal amplification and regulation,3 feedback loops, molecular rotors (viscometers),4 and near IR activated BF2-azo complexes,5 among others.