Learn about a wide variety of grips -- ranging from grips on sports goods to grips on motorcycles.

http://www.gripinfo.com

This is a metric conversion calculator to convert between different units of measurement like the metric system, british/american, avoirdupois systems, but also more exotic systems like japanese, ancient greek, biblical and old swedish measures.

http://www.convertunit.com

Color measurement center is the place for all colorists and people who are working on color instrumentation. We have prepare all necessary information on color measurement, color theory, how-tos, spectrophotometer and colorimetry.

http://www.color-measurement.com