Found in natural products, and frequently used as flavoring agents or as building blocks for pharmaceuticals, diazines and their benzo derivatives possess a diverse set of properties, allowing a broad range of applications, spanning from medicinal chemistry to electrochemistry. New diazine-based natural products continue to be isolated and studied. In addition, new syntheses, reactions, and applications of diazine-based compounds are reported every year. Recent advances in the development of new preparations, reactions, and applications of diazines and their benzo derivatives as well as the discovery of new diazine-based natural products, published in the literature in 2014, are discussed in this review.