In any programming language source code, the code that is repeated is called the clone. The clone detections have got much attention in the recent years. In literature there are a number of clone detection techniques have been proposed. These techniques includes CP-Miner, CC-Finder etc. each of these techniques attempts to detect the clone from the source code of various programming languages. In this study, we will provide comprehensive details of the various clone detection techniques proposed so far. These techniques have been critically evaluated based on a no of efficiency measure parameters. In our future work we will propose our own clone detection technique that will more efficient and accurate in terms of code clone detection from multiple programming languages. © 2014 Academy Publisher.