Silicon MEMS as electrostatically levitated rotational gyroscope and 2D optical scanner, and wafer level packaged devices as integrated capacitive pressure sensor and MEMS swatch are described. MEMS which use non-silicon materials as diamond, CNT (carbon nano tube), LTCC with electrical feedthrough, SiC (silicon carbide) and LiNbO3 for multi-probe data storage, multi-column electron beam lithography system, probe card for wafer-level burn-in test, mold for glass press molding and SAW wireless passive sensor respectively are also described.