ChemGlobe: Francium: Electronic, thermal, and steric data along with an isotope table.
ChemicalElements.com: Francium: Basic information, atomic structure, and isotopes table.
EnvironmentalChemistry.com: Francium: Atomic structure, chemical and physical properties, and table of nuclides.
Francium: Data tables and historic information.
Francium: Isotopes, natural occurrence, separation, analytical properties, applications, and bibliography.
Francium Spectroscopy: Research group at the State University of New York at Stony Brook. History, facts, trapping information, and production.
It's Elemental: Francium: Basic physical and historical information.
LANL: Francium: Basic information and history.
Lenntech: Francium: Physical data and chemical properties.
Visual Elements: Francium: Image, general and physical information, and key isotopes.
WebElements: Francium: Extensive information on history and properties.
Wikipedia: Francium: Properties of the element, including its history and characteristics.