CINDAS LLC provides critically evaluated materials properties databases for thermal, mechanical, electrical, physical and other properties of various materials including aerospace alloys. We provide Web-based applications for searching and comparing continually updated data. There are about 5,000 materials and over 50,400 data curves in the Thermophysical Properties of Matter Database (TPMD), over 1,025 materials, and over 22,500 data curves in the Microelectronics Packaging Materials Database (MPMD) and about 86,000 data curves on 232 metal alloys in the Aerospace Structural Metals Database (ASMD).