A set of replacement unit bars with Click-casting functionality.
Features:
Player, Party& Target frames display an icon showing either their Class (for a player) or the type of creature, e.g. humanoid, beast. I used the same icons as the hunter track abilities.
Party members health will show either as their max health, or their health deficit.
Player& Party frames filter buffs so you will only see buffs that you can cast on others (so no Inner Fire etc.)
Player& Party frames show debuffs by changing the colour of the frames. This only happens if you can cure that debuff. All colours are customisable.