Druid

Druids cast divine spells much the same way clerics do, though most get their spells from the power of nature rather than from deities. Their spells are oriented toward nature and animals. They strive to live in harmony with the natural world, and hate anything that is not part of the natural cycle, especially aberrations and undead creatures. In addition to spells, druids gain an increasing array of magical powers, including the ability to take the shapes of animals, as they advance in level.

Alignment restrictions: Any partially neutral - druids, in keeping with nature's ultimate indifference, must maintain at least some measure of dispassion

A world exists outside city walls. Those who walk in nature as with a friend — a friend both beautiful and dangerous—know this world. They know the touch of snow, the taste of secret waterways, the feel of nature, wild and untamed… and they find ease in the company of beasts. Though, indeed, ask a druid of the Silver Circle just who is the beast, and man’s name is foremost. Savagery bears not the guilt of duplicity, and only man, among the animals, lies. It is given to these to know the friendship of animals, boon companions to follow them from a natural environment into danger, and such is the trust they have. Be certain never to abuse this trust. The gods who grant care to dwellers in the wild care firstly, often, for the beasts. Remember such, and honor it.

Druid Deities
This is a conclusive list of all druid deities: Chauntea, Eldath, Gwaeron Windstrom, Lurue, Malar, Mielikki, Nobanion, Shiallia, Silvanus, Talos, Ubtao, Ulutiu, Umberlee, Anhur, Isis, Osiris, Sebek, Set, Thard Harr, Aerdrie Faenya, Angharradh, Deep Sashelas, Rillifane Fallathil, Baervan Wildwanderer, Segojan Earthcaller and Sheela Peryroyl. See the Deities page for details on each.

Animal Companions - Neverwinter Nights 1
Animals may not be summoned during combat. New companions might not come when summoned from within an urban area. Animals may be dismissed for a short time or permanently. They persist across servers and level up with the PC at levels 3, 6, 9, 12, 15, 18. Animal choice at PC creation has no effect. Rangers summon level 1 animals at level 6 and at 5 levels less than PC level thereafter. The Realms have a very varied wildlife, and thus the available animal companions vary depending on where you are.

Animal Companions - Neverwinter Nights 2

Class features
Hit die: d8
Proficiencies: Armor (Light, Medium), shields (except Tower shields), Weapons (Druid: club, dagger, dart, quarterstaff, scimitar, sickle, sling, and spear). They are also proficient with all natural attacks (claw, bite, and so forth) of any form they assume with wild shape.
Skill points: (* 4 at 1st character level) 4 + Int modifier
Class skills: Concentration, Craft, Diplomacy, Handle Animal, Heal, Knowledge: Nature, Listen, Profession, Ride, Spellcraft, Spot, Survival, Swim
Base attack bonus progression: Medium
Saving throws
high: Fortitude, Will
low: Reflex

For further Druid technical details, see here