Environmental Chemistry
Environmental chemistry.com: Periodic Table: Osmium
A site that has it all. This is probably the best place to start looking for information or data on osmium.
Florida-Spectrum Environmental Services
Florida Spectrum: Chemical Fact Sheet: Osmium
This site provides a fact sheet with information on the basic data and properties of Osmium. It also includes some of its uses.
Web Elements
Web Elements Periodic Table: Osmium
This WebElements site offers lots of fundamental information on osmium, Bohr diagrams and details on its purification.
Corrosion Source
Corrosion Source: Osmium
This resource presents basic data, along with good information on the history, sources, properties and uses of osmium.
University of Kentucky
Uk: Osmium Comics
Comics featuring osmium, with nice graphics for presentations.
Royal Society of Chemistry
Royal Society of Chemistry: Osmium
The ChemicalSociety provides a short entry with information on the history, description and uses of osmium.
TED Talks
Ted: Ted Ed: Osmium: Periodic Table of Videos
The team at Periodicvideos has created a TED-Ed Lesson for every element of the periodic table. Osmium is element number 76 on the periodic table. [2:47]
Other
Reade International Corp.: Osmium (Os) Powder, Shot, Pellets & Ingot
Nice description and collection of physical data on osmium.
Chemicool
Chemicool: Osmium
This site, which is provided for by Chemicool, gives a set of data tables that cover a great many physical and chemical properties of osmium.