Knovel is an online library of over 3000 technical books and databases. All the resources included have been vetted for quality through normal publication channels. Some of the most important databases with physical, electrical, chemical, and mechanical property information are included in this resource. Large encyclopedia sets in all technical areas including energy, sustainability, environmental sciences as well as chemical engineering and nanoscience are also available.
Everything is full text. Everything is searchable. Some resources have interactive graphs, charts and equations.
Knovel also provides access to over 800 interactive equations, a fantastic periodical table, and an extensive unit conversion tool.