It's Elemental: Selenium
The Element Selenium - Basic Physical and Historical Information
http://education.jlab.org/itselemental/ele034.html

LANL: Selenium
Production, properties, isotopes, and handling.
http://periodic.lanl.gov/elements/34.html

ChemicalElements.com: Selenium
Basic information, atomic structure, and isotopes.
http://www.chemicalelements.com/elements/se.html

Selenium
Manufacturer of drivers and accessories for home and professional industries. Portugal.
http://www.seleniumloudspeakers.com

Wikipedia: Selenium
Properties of the element, including its history, applications, and characteristics.
http://en.wikipedia.org/wiki/Selenium

ChemGlobe: Selenium
The chemical element [Se] - Selenium - Datasheet
http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/34.html

EnvironmentalChemistry.com: Selenium
Comprehensive information for the element Selenium – Se is provided by this page including scores of properties, element names in many languages, most known nuclides and technical terms are linked to their definitions.
http://environmentalchemistry.com/yogi/periodic/Se.html

Lenntech: Selenium
chemical properties, health and environmental effects of selenium
http://www.lenntech.com/Periodic-chart-elements/Se-en.htm

Visual Elements: Selenium
Image, general and physical information, source, uses, key isotopes, and ionisation energies.
http://www.chemsoc.org/viselements/pages/selenium.html

Selenium
Open source test automation tool for executing scenarios against web applications to validate browser compatibility and system functionality.
http://www.openqa.org/selenium/