From Forgotten Realms Wiki

Chaotic good combines a good heart with a free spirit.

A chaotic good character acts as his conscience directs him with little regard for what others expect of him. He is kind and benevolent, a strong individualist hostile to the claims of rules, regulations, and social order. He hates it when people try to intimidate others and tell them what to do. He will actively work to bring down unjust rulers and organizations and to liberate the oppressed. He finds lawful societies distasteful and will avoid them, often living as a nomad or hermit.

Noble rebel leaders fighting corrupt or venal regimes, vigilantes acting for what they see as the greater good, mercenaries who only work for the "good guys" and anyone who "robs from the rich to give to the poor" are all examples of chaotic good characters.

[edit] Characters

Some of the characters identified as Chaotic Good in the Forgotten Realms setting include:

Alustriel Silverhand
Danilo Thann
Dove Falconhand
Drizzt Do'Urden
Elminster Aumar
Laeral Silverhand
Mirt
Qilué Veladorn
Storm Silverhand
Volothamp Geddarm

Non-canonical:
Alora
Coran
Kivan
Nalia de'Arnise
(Minsc is a canonical character whose non-canonical version is known to be Chaotic Good.)

[edit] See Also

Alignment
Lawful good	Neutral good	Chaotic good
Lawful neutral	(True) neutral	Chaotic neutral
Lawful evil	Neutral evil	Chaotic evil