Phidgets

Phidgets are primarily for sensor integration and connectivity, and while they are relatively expensive, they do offer a broad range of available components, and a  good API for development across platforms. In particular their Starter kits offer a broad range of introductory sensors for deployment. Their ability to keep items in stock is somewhat iffy, but the range within their packages is still worthwhile. Managing separate product specs for sensors and interfaces can be a headache without the wrapper phidgets provides.