// Prints the name of this collider
function OnCollisionEnter(other : Collision) { 
     print("This collider is named: " + other.contacts[0].thisCollider.name);
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void OnCollisionEnter(Collision other) {
        print("This collider is named: " + other.contacts[0].thisCollider.name);
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def OnCollisionEnter(other as Collision):
        print(('This collider is named: ' + other.contacts[0].thisCollider.name))