Nowadays more and more emphasis is put on the development of environmentally friendly technologies. It is well known that the use of cutting fluid or cooling liquid poses risks to environment and health. It can also increase the cost of manufacturing. This paper presents the latest developments in smart cutting tools having internal cooling. This paper unites the main researches that have been done in the field of internally cooled tools. Many proposed solutions are still at the conceptual level. This paper recognizes the concepts of internally cooled tools and gives directions for further research and discussions.