R> all.datasets <- data.frame(
  data(package=.packages(all.available=T))[[3]]
)

R> all.datasets[,-2]
      Item   Package                   Title
      Nile  datasets  Flow of the River Nile
    Orange  datasets  Growth of Orange Trees
 txhousing   ggplot2     Housing sales in TX
      acme      boot  Monthly Excess Returns
Earthquake      nlme    Earthquake Intensity
      Meat      nlme      Tenderness of meat
          

• Body Temperature Series of Two Beavers
• Snail Mortality Data
• Urine Analysis Data
• Yearly Numbers of Important Discoveries
• Distances Between European Cities and Between US Cities
• The World's Telephones
• Student Admissions at UC Berkeley
• Number of Flaws in Cloth