sample of AI enemy collision

is there sample of enemies walk around the world and sometimes enemies will collide each other? and what i need is enemies might avoid to collide each other.

I am unsure about samples though these packages/projects do. I know that Unity Steer avoids people, and that A* Pathfinding avoids walls (Have not used either personally) so avoiding people would be the same method somewhere in the script, maybe browse through the script and take a look (If the license lets you)

If programming yourself, I would use a raycast and then if it collided with something rotate until the raycast stops hitting the wall/person/collision.