The race of gnomes. They are black-haired and have dark-colored eyes. They are extremely intelligent. The only kind of magic they can do is sound magic. They worship a single god who works via assorted servants and messengers. They believe the powers that be are generally distant and uninvolved in their lives. Their government is a representative democracy that is extremely corrupt. They exist as servants to another race.
The race of halflings. They are gray-haired. Their magical practices tend to focus on fungus magic. They exist as servants to another race.
The race of Gremlins. Their magical practices tend to focus on light magic. They seek enlightenment. They control a swampy country that has been devastated by war.
The race of Giants. They have an affinity for tunnels. They are noted for their treasure-vaults. Their emotions are hard to understand for others. They barely control an underground city-state that bears a terrible curse.
The race of Nymphs. They are well-known for their black market. They worship a single abstract deity who works with a host of created sub-deities that are also worshiped - this deity in turn has a nemesis responsible for evil in the world. They believe the powers that be are intimately involved in their lives. Their government is functional. They completely control a subterranean empire. The gods that created them in turn abandoned them.
The gnomes as sound magic is interesting to me. I imagine a trade language to be developed that uses sign language in order to avoid deception of the gnome race. I also imagine an entire school of magic around the modification of sound and acoustics (spells like louder, illusionary sound, modulate sound, changing timbre (like male to female voice, human to elven voice, lute to piano, etc.)
I also like fungus magic - I imagine them controlling a host of golem type creatures made of mushrooms.