BBC: Henry I (1069 - 1135) - The youngest and ablest of William I the Conqueror's sons, Henry strengthened the crown's executive powers and modernised royal administration. - http://www.bbc.co.uk/history/historic_figures/henry_i_king.shtml
The Normans: Henry I - A brief summary of the life of Henry I. - http://www.royal.gov.uk/output/Page54.asp
Wikipedia - Henry I of England - Article about the life and reign of the English king. - http://en.wikipedia.org/wiki/Henry_I_of_England
Charter of Liberties of Henry I, 1100 - Charter granted by Henry that served as the model for the Magna Carta in 1215. - http://www.fordham.edu/halsall/source/hcoronation.html
Henry I, Beauclerc (1100-1135 AD) - Biographical article about the king nicknamed "Beauclerc" (fine scholar) for his above average education. - http://www.britannia.com/history/monarchs/mon24.html
Henry I - Short biography for the king of England (1100–1135), youngest son of William I. - http://www.factmonster.com/ce6/people/A0823365.html