Have you ever stumbled upon relatively unpopular apps that absolutely blow your mind away? Let's face it, it's tough searching through iTunes for these hidden gems. So if you know of any, post them here. Abca and Dark Nebula were two hidden gems that eventually became quite popular. Movies Now and Groceries were utilitarian apps no one knew about. Currently undiscovered ones are Destroid, Dwindle, Fox VS Duck, TimeFlow, ColorBind and The Font Game. What are yours?