With the development of science and technology and with space exploration, hazardous environment work, and production requirements of small batch, short run and quick change-over, traditional concept of mechanisms and robots development are facing a challenge in the 21st century for adaptability and reconfigurability. Since 1990s, researchers are generating new ideas and concepts for new mechanisms and machines including robots for reconfigurability. This resulted in kinemetatropic linkages, metamorphic mechanisms, and various topology, etc. The new mechanisms have a property of generating different topological configurations for reconfigurability and for various task requirements.